What year is my motor?

Author Message   Chao Vang New member Username: 82skeeterm Post Number: 1 Registered: 12-2007 Posted on Sunday, December 09, 2007 - 11:44 pm:    How can I find out the year of my motor? It's a 150 Mariner, The motor is grey with the orange strip. Along the strip it has the name Mariner with oil injected printed on side of the cover. Is it the earlier 80's or later 80's model? The serial number is 6494246. I bought it for 1,000 and all 6 cyclinders has a compression of 115-120. Did I get a good deal or not?   Graham Lamb Senior Member Username: galamb Post Number: 2342 Registered: 05-2007 Posted on Monday, December 10, 2007 - 01:06 pm:    Post the serial and it can be looked up....   Chao Vang New member Username: 82skeeterm Post Number: 2 Registered: 12-2007 Posted on Monday, December 10, 2007 - 01:34 pm:    The serial number is 6494246. Thanks   Graham Lamb Senior Member Username: galamb Post Number: 2343 Registered: 05-2007 Posted on Monday, December 10, 2007 - 05:36 pm:    Chao, that is a 1983, Mercury built Mariner...   Bernie Nolan Visitor Posted on Thursday, December 27, 2007 - 07:08 pm:    I am trying to find out the year of manufacture of my 35 hp mercury outboard serial no. 9463953   Graham Lamb Senior Member Username: galamb Post Number: 2380 Registered: 05-2007 Posted on Friday, December 28, 2007 - 02:19 pm:    Bernie, that is a 1986 model - well built motor...   Bernie Nolan Visitor Posted on Sunday, December 30, 2007 - 02:42 am:    Thankyou Graham, much appreciated. Happy New year!!   Brent dambergs Visitor Posted on Wednesday, January 23, 2008 - 07:33 am:    I am in australia I have just bought a boat with a 40hp Blue band Mercury Serial number is 8027594. can u tell me what year model this is? is it a well made model? Also I just changed the impeller in the water pump, fired it up with the ear muffs on it and all good in the water department, but she wouldn't idle I had to keep the revs right up or she would stall is this cause its still cold or is there tuning problems?   brent dambergs Visitor Posted on Wednesday, January 23, 2008 - 08:03 am:    Sorry me again, i forgot to add that i had it running for about 3-5 minutes and varied the revs range a bit, i put it into forward gear and it revved up in gear fine brought back to neutral. if I lowered the idle lever on the merc controls back to 45 degree angle it would just stall. New plugs, compression and park tested good i also tried pumping the fuel line whilst running no value. Is it muck inthe carbs ie: air idel jets dirty? or just needs more time to warm up?   Graham Lamb Senior Member Username: galamb Post Number: 2471 Registered: 05-2007 Posted on Wednesday, January 23, 2008 - 01:19 pm:    Brent, can only narrow down your model year to a range. Your serial number is Austrailian and like the Canadian models, they weren't too careful about keeping good records on the corresponding years (at least none that I have ever found). My best guess is 1974-76. I do have some Ausi serials for a little later (78/79) and yours comes in below that. Secondly, I believe the bluebands started in 74. From your description in your second post it does sound like you have a dirty/slightly clogged low speed jet. Probably worth stripping down the carb cleaning and adjusting...   london marine Visitor Posted on Wednesday, January 23, 2008 - 04:42 pm:    If it has plain blue stripes as part of the trim than it is 72 to 75 model year.After that they got fancier with the trim graphics.   brent dambergs Visitor Posted on Thursday, January 24, 2008 - 09:58 am:    thanks guys I also dropped into my local boat man today with the serial number, he went through his books and said its a 1983 model. any info on carby dismantling and reassembly?   brent dambergs Visitor Posted on Thursday, January 24, 2008 - 10:14 am:    for your archives Mr LAMB http://www.outboardparts.com.au/id/HOW%20TO%20FIND%20YEAR%20OF%20MANUFACTURE%20O F%20YOUR%20MERCURY.htm .this link gives all serials and models from 2.2hp through to V300's that were sold in Australia. thanks again for your info.   Graham Lamb Senior Member Username: galamb Post Number: 2474 Registered: 05-2007 Posted on Thursday, January 24, 2008 - 01:39 pm:    Brent thank-you, that's a great addition to my lists   josh kester New member Username: mackdady7 Post Number: 1 Registered: 02-2008 Posted on Thursday, February 21, 2008 - 04:03 pm:    I cant find the serial # on my 250 merc black max. I need it to find out the model yr and was told it could be found near the transom mount but nothing there.... Any ideas?   Tim Ridgley New member Username: oldmanroo Post Number: 1 Registered: 05-2008 Posted on Saturday, May 03, 2008 - 02:10 am:    HI, yet another YOM question. Mariner 4HP Geo-S-090523. Sold in the UK. Thanks, Tim.   Graham Lamb Senior Member Username: galamb Post Number: 3099 Registered: 05-2007 Posted on Saturday, May 03, 2008 - 12:16 pm:    Tim, that is a 1987 "A" model, Yamaha built Mariner. Your "G" is actually a 6. The Model is 6EO (which is a Yami series code) - S (for short shaft) - 090523 (which is the actual serial number)....   Thomas Stout New member Username: drydoc Post Number: 1 Registered: 05-2008 Posted on Tuesday, May 20, 2008 - 01:22 pm:    Hello, I think this is the correct place to ask this ? I have a Mercury Marine Outboard it is an in-line 6 cyl Big Black case the serial is 4739142 It also says Thunderbolt ignition on a cover. Question is what year is this and what Horsepower am I looking at?? Thanks for your time!!   Graham Lamb Senior Member Username: galamb Post Number: 3209 Registered: 05-2007 Posted on Wednesday, May 21, 2008 - 03:19 am:    Thomas, the inline 6, "tower of power" could be anything from a 90 horse on up - the serial does not contain encoded information. However, with that serial, it's probably a 1977 model which would possibly make it a 100, 115 or a 150 horse. If you can find the carb model stamped in the carb somewhere that may help narrow it down (maybe).   Thomas Stout New member Username: drydoc Post Number: 2 Registered: 05-2008 Posted on Wednesday, May 21, 2008 - 08:55 am:    OK Thanks for your quick reply. I will check into it. I have to find out why the starter wont turn the motor, but the e-rope will..see ya soon   bigbadbob Visitor Posted on Wednesday, June 04, 2008 - 02:56 am:    Hi can anyone identify my motor, thought to be mercury 4hp but searching among serial number lists reveals nothing. S/N 09828542 Any help gratefully recieved.   bigbadbob Visitor Posted on Wednesday, June 04, 2008 - 03:01 am:    p.s. made in belgium by marine power europe. (if that's any help)   Graham Lamb Senior Member Username: galamb Post Number: 3308 Registered: 05-2007 Posted on Wednesday, June 04, 2008 - 09:35 am:    Bob you have a 1994 model...   bigbadbob Visitor Posted on Wednesday, June 04, 2008 - 11:09 am:    Many thanks for the quick reply Graham. Have a virtual pint on me.   Robert DesLauriers Visitor Posted on Wednesday, June 04, 2008 - 12:31 pm:    I like this site..definately going to bookmark it. I have a 40hp Merc aprox 1990 s/n- 0D174227. The fuel enrichment valve doesn't seam to be working. What usely happens to them.. This one clicks when the key is pushed in, but you have to put your hand over a carb to choke it to get it to fire up. I just got it, and its one of the things I'm going to look into.. Any direction would be helpfull.. Thanks Rob in White Lake, Mi   Graham Lamb Senior Member Username: galamb Post Number: 3316 Registered: 05-2007 Posted on Wednesday, June 04, 2008 - 07:17 pm:    Robert, your serial actually comes up to 1992. The enrichment valve is just a small solenoid that when you depress and hold the key, the valve opens to let some gas flow to assist with starting (cold). This system relies of gravity to work. The valve is fed by a tube from the top carb (bowl) which is then supposed to feed the throat of the top and bottom carb. A clog/break/rot etc anywhere in the little tubing or a bad connection and it's not going to work. If you can hear the solenoid functioning then that component is probably fine, as stated it's a simple open/close switch. To try and isolate a clogged hose etc, after you hear the click, grab the fuel bulb on the main fuel line from your tank and pump it up firm. Then remove first the tube feeding the lower carb and see if you get gas dripping, replace it and pull the tube to the upper carb - if both or neither results in any gas flow, replace the tubes including the main feed from the upper carb to the solenoid...   Robert DesLauriers Visitor Posted on Thursday, June 05, 2008 - 12:15 pm:    Thats what I wanted to know.. Thanks for the info and the exact year of my engine.. Anything else I should watch for on this year of outboard? What do you think its worth? Thanks alot!!! Rob D   Graham Lamb Senior Member Username: galamb Post Number: 3324 Registered: 05-2007 Posted on Thursday, June 05, 2008 - 08:18 pm:    A decent running early 90's model 40 horse would normally sell quite easily for a grand in the used market - with the cost of gas these may start gaining a little more popularity which would increase demand and value. Over the past few years the move has been to "MORE" horsepower - but the way things are going I think alot of guys are going to settle for a little less speed and a few more bucks left in the wallet...   Robert DesLauriers Visitor Posted on Friday, June 06, 2008 - 11:33 am:    Thanks again for you help.. Rob in White Lake, MI   Ronald Berndt New member Username: ronald_b Post Number: 1 Registered: 06-2008 Posted on Monday, June 16, 2008 - 09:31 pm:    What year is my Mercury Thunderbolt 115HP Serial Number 3948005?   Lawrence Jackson New member Username: kimnlj2 Post Number: 1 Registered: 06-2008 Posted on Monday, June 16, 2008 - 11:59 pm:    Hi I was wondering if you could tell me the year of my motor. 30 HP.... 689 s 031236 Thanks Lawrence   Graham Lamb Senior Member Username: galamb Post Number: 3404 Registered: 05-2007 Posted on Tuesday, June 17, 2008 - 04:04 am:    1988 Yamaha built Mariner...   Graham Lamb Senior Member Username: galamb Post Number: 3406 Registered: 05-2007 Posted on Tuesday, June 17, 2008 - 04:20 am:    Ronald, that a 1974, model 1150   mobiletec New member Username: mobiletec Post Number: 1 Registered: 06-2008 Posted on Tuesday, June 17, 2008 - 08:16 pm:    Hi i was wondering if i could find out the year of my merc 65 hp Serial#7058998 Thanks   Graham Lamb Senior Member Username: galamb Post Number: 3423 Registered: 05-2007 Posted on Wednesday, June 18, 2008 - 08:33 am:    That is a 1975, Canadian built, model 650, 3 cylinder, 65 horse according to your serial...   mobiletec New member Username: mobiletec Post Number: 2 Registered: 06-2008 Posted on Wednesday, June 18, 2008 - 12:25 pm:    Thanks GrahamIam a small engine mechanic. Mostly work on commercial turf equipment, also residential. I just purchased this boat. Owner gave me a second motor same 650. Is there a way to get an indication if the water pump impeller is pumping to specs. the unit was started for me with the muffs. Just not sure how much pressure should be on output water. Is there a way to measure? Thanks in advance   crw Visitor Posted on Wednesday, June 18, 2008 - 01:56 pm:    Hi could you help me to put a date to my mariner 40hp the number is 018973 thanks   Graham Lamb Senior Member Username: galamb Post Number: 3438 Registered: 05-2007 Posted on Friday, June 20, 2008 - 11:42 am:    crw if it has a 6F6 in front of that number it's a 1989 Marathon model built by Yamaha...   Graham Lamb Senior Member Username: galamb Post Number: 3439 Registered: 05-2007 Posted on Friday, June 20, 2008 - 11:47 am:    Mobil - sorry almost missed your post. You should be getting about 3-5 psi. Mostly the way you check it is just hold your hand under the flow while it's running. After idling for maybe 5 minutes you should get nothing more than "luke warm" water. If it feels at all hot, or worse yet, you see steam, you have an issue. At any point after shutting it down, you should be able to place your hand on the powerhead and keep there for a few seconds without burning skin. Basically you want the temp to get nowhere above about 170 degrees (give or take a little) on the powerhead itself....   sidney quarrier Visitor Posted on Saturday, June 21, 2008 - 12:28 pm:    I've rebuilt the carburator on my mariner 25 and can't get it running right. It's running way too rich, blowing smoke and spots of oil and using twice the fuel it should. Can anyone offer suggestions and can you help me check the year model as I may have put in the wrong rebuild kit? Serial number is OD294844. Thanks, Suds   IBNFISHN Advanced Member Username: ibnfshn Post Number: 331 Registered: 11-2005 Posted on Saturday, June 21, 2008 - 12:41 pm:    Sidney, your motor is a 1994. Start a new thread for your problems to make it easier to follow.   bruce curran Visitor Posted on Sunday, June 22, 2008 - 05:18 pm:    I have 35 hp Merc serial # is either dc or oc 103392 can any one tell me what year it is?...just got it this year it runs great but past two days it pops out of forward at about 80% throttle any ideas? and will not run up again in gear....only goes at about 30 %   Graham Lamb Senior Member Username: galamb Post Number: 3479 Registered: 05-2007 Posted on Sunday, June 22, 2008 - 09:44 pm:    Bruce, 0C103392 (Zero, C, etc) would make it an 89 model which was the last year of production for your particular model. I'm not overly familiar with the shift linkage on these at the powerhead end of things - perhaps JB can jump in here and give some advice..   Bruce Curran New member Username: bruce_c Post Number: 2 Registered: 06-2008 Posted on Tuesday, June 24, 2008 - 04:25 am:    Graham Thanks for the info on the year ....who is JB and can I contact him directly?   Graham Lamb Senior Member Username: galamb Post Number: 3500 Registered: 05-2007 Posted on Tuesday, June 24, 2008 - 09:38 am:    Go back to the main Merc page and "start a new discussion" (up on the top of the page). Just make your topic - a question for JB - he'll stop in and give you an answer. He is outstanding with mid-horsepower motors of your vintage...   Chris and Jan Cranie New member Username: chrisandjan Post Number: 1 Registered: 08-2008 Posted on Saturday, August 02, 2008 - 07:57 am:    Hi all, Just bought a Mariner 30 HP 2 stroke O/B and wondered if anyone could let me know what year it is. Mariner 30ML - 689 - L - 531356 Cheers, Chris   JohnWood Visitor Posted on Saturday, August 02, 2008 - 11:32 am:    Hi, I have an "older" Mariner 40 hp and want to know what is the model year of this outboard. The particulars (the best that I can determine)are: *Mariner 40 BE *676 B405064 *manufactured in Japan All comments are welcome, Thank you   Graham Lamb Senior Member Username: galamb Post Number: 3781 Registered: 05-2007 Posted on Saturday, August 02, 2008 - 02:06 pm:    John, that is a 1979 Yamaha built Mariner..   Graham Lamb Senior Member Username: galamb Post Number: 3782 Registered: 05-2007 Posted on Saturday, August 02, 2008 - 02:09 pm:    Chris, almost didn't see your post there... You have a 1991 Yamaha built Mariner.   pat lally Visitor Posted on Monday, August 04, 2008 - 04:03 pm:    Serial 40 el 6e9l 422 755 I got this 2 weeks ago,swapped for a laptop, and was wondering what age it is, looks like almost no use, but i havent started it yet, as i cant figure out the wiring colour codes, to find where i can fit a stop switch (if thats the right terminology, im new to this) Any inf would be very gratefully appreciated pat   Graham Lamb Senior Member Username: galamb Post Number: 3792 Registered: 05-2007 Posted on Monday, August 04, 2008 - 04:17 pm:    Pat, that's a 1986 "C" model Mariner built by Yamaha for Merc. Originally there would have been a kill switch, with a tether connected (one of those curly cords that you clip on to yourself in case you go overboard). The kill switch itself would need the tether hooked in (pull the switch and keep it "out" to keep the ignition on). I don't have the wiring for these Yami built motors, but most kill circuits are black wires with a yellow stripe. The switch should be on the front of the motor near the choke...   KenJuster Visitor Posted on Wednesday, August 06, 2008 - 11:49 am:    Hi, Can somebody tell me what year this motor is: 6E3 - 40695 Also, what is the correct fuel/oil ratio? Thanks, Ken   brian k. zitlow New member Username: gizzmo Post Number: 1 Registered: 08-2008 Posted on Wednesday, August 06, 2008 - 01:58 pm:    could you please tell me the year of this outboard:-40 ELO 6E9-l-430998. thank you.   Toby Ruth Visitor Posted on Saturday, August 09, 2008 - 12:26 pm:    I posted this on an older posting group and then spotted this more recent one so I will put it here also. I have a 5 HP Mariner outboard with "Made in Japan" on the ID tag. The numbers are 661 followed by S38423. I would like to know 3 things: (1) the year of the motor: (2) the correct gap for the points and plug (3) the fuel/oil mixture.   Graham Lamb Senior Member Username: galamb Post Number: 3865 Registered: 05-2007 Posted on Saturday, August 09, 2008 - 02:41 pm:    Toby, should always start a new discussion - that way you don't get lost in the mess. Anyhow, you have a Yamaha built Mariner. It is a 1977 "A" model. This is an air-cooled motor but I don't have the mixing specs for gas/oil. Other air cooled's mix at anywhere from 16:1, 24:1, 32:1 or 40:1 - but you want to get it right. It uses an NGK B7HS plug gapped at .024" I don't have specs on the point gap for this motor. It would probably be in Selocs manual for 1 and 2 cylinder "Mariners" - but that's pub that I don't have - perhaps someone else on the board could help out with that.... The motor itself was the same as Yamaha's own branded 5BS model which was produced between 1973-1980... Sorry can't help further...   JB Senior Member Username: beckerjs Post Number: 1243 Registered: 11-2005 Posted on Saturday, August 09, 2008 - 03:07 pm:    Graham, could you tell me the year of my motor 40hp, merc, s/n 6415755, 1983, oops wasn't supposed to post that. You're just post whoring   Graham Lamb Senior Member Username: galamb Post Number: 3866 Registered: 05-2007 Posted on Saturday, August 09, 2008 - 08:37 pm:    Now you know better - you should be starting a new discussion - might have got lost in this mess... But you do know your motor is really just a 35 horse, at least after they went from brake to shaft horsepower ratings   Arthur L. Johnson Visitor Posted on Monday, August 18, 2008 - 12:46 am:    I have a 60HP Mariner, serial number is A110838. Would you please give me the year it was made and the type of motor it has in it. Where can I find a shop repair manual for this motor? Thanks beforehand for your help! God Bless!   Graham Lamb Senior Member Username: galamb Post Number: 3908 Registered: 05-2007 Posted on Tuesday, August 19, 2008 - 08:42 am:    Arthur, that is a 1984, Mercury built Mariner. A Selocs manual for Merc's of that vintage/# of cylinders will be applicable to your motor. This was one of Merc's 3 cylinder models. It shared a powerhead with the 50 horse of the same vintage, so most parts between the two models are interchangable. Although the powerhead and gears were built by Yamaha, they were built for Merc, so this model should not be confused with Mariners that were completely built by Yamaha - this is very much a Merc....   Dan Hill Visitor Posted on Tuesday, August 19, 2008 - 11:02 am:    I have a Mercury 115hp serial # A180189. My brother just gave this to me to try and sell for him. Can anyone tell me what year it was made and an approximate value if in good running condition? Thanks!   mark stent New member Username: mark_stent Post Number: 1 Registered: 08-2008 Posted on Tuesday, August 19, 2008 - 03:02 pm:    Hello there, I have a Mercury outboard serial no. 9197194 can anyone give me the year it was made and the type of motor it has? is it 3 cylinder? what is the fuel/oil mix? Where can i find the manuals for this? any opinions at all on the reliability and quality of this engine, and any information would be much appreciated. This is my first boat and outboard and im finding it all very interesting! thanks, Mark Stent   Graham Lamb Senior Member Username: galamb Post Number: 3910 Registered: 05-2007 Posted on Tuesday, August 19, 2008 - 06:25 pm:    Mark, the serial number in itself gives "zero" information. You will need to post how many cylinders it has just so we can even narrow it down to a number of possibilities. The number of cylinders, plus the casting numbers from one of the carbs (if multiple) will provide the first clues as to what you have...   Graham Lamb Senior Member Username: galamb Post Number: 3912 Registered: 05-2007 Posted on Tuesday, August 19, 2008 - 06:36 pm:    Sorry Dan, you almost got lost there. You (He) has/have a 1985 Inline-6 often referred to as a "Tower of Power". Decent motors however the design was scrapped a year or two after that motor was made. They do have a bit of a following out there, but they are by no means a collectable or anything like that. If it's in decent running shape you may get 500 bucks for it, maybe a 100 or 200 more if it's quite exceptional.   mark stent New member Username: mark_stent Post Number: 2 Registered: 08-2008 Posted on Tuesday, August 19, 2008 - 08:34 pm:    Hi Graham, Thanks for the quick response. I'm now told by the previous owner that it has 3 cylinders and that he believes it to be a Model 700 70hp outboard. Does that help narrow it down? Any more info would be great. Other than that i can try to take the cowling off tommorow to get a closer look. Thanks again. Mark.   garry hawley Visitor Posted on Tuesday, August 19, 2008 - 09:08 pm:    mariner 40 hp serial 428271 code 6e9l model 40elo what year is it????????   Graham Lamb Senior Member Username: galamb Post Number: 3913 Registered: 05-2007 Posted on Wednesday, August 20, 2008 - 02:35 am:    Mark, that really helps. That would make it a 1978, 3 cylinder, model 700, 70 horse Merc. You can mix this at 50:1 - regular unleaded (86/87 octane with no more than 15% ethanol) and TCW-3 rated marine 2 cycle oil will work fine. As to manuals - a Merc service manual for this model is still available at a Merc dealer - part number 90-861355 but pricey at about 70 bucks - for all round maint etc, Seloc's has an excellent series of manuals (about 35 bucks) - just have to grab the one for 3/4 cylinder models of your particular vintage..   Graham Lamb Senior Member Username: galamb Post Number: 3914 Registered: 05-2007 Posted on Wednesday, August 20, 2008 - 02:37 am:    Garry, that's a 1987 Yamaha built Mariner...   mike henshall Visitor Posted on Wednesday, August 20, 2008 - 09:51 am:    hi there my friend and i have just bought a small fishing boat with a 40hp mariner engine and i was hoping to find any information i can about it. after being stood for 3 years i managed to get it going but not sure wether it's a 2 or 4 stroke and if 2 stroke we have no idea of the fuel to oil ratio. we used a 50-1 mix to get it started. the only number i could find was on a plate in pretty bad condition but i think it's 676bs00178. we are trying to find year etc in order to obtain parts. thanks for your help.   mark stent New member Username: mark_stent Post Number: 3 Registered: 08-2008 Posted on Wednesday, August 20, 2008 - 08:40 pm:    Hello again Graham, Thanks for the useful info regarding my 1978 3 cylinder, model 700, 70 hp Mercury outboard. What i need to find out asap is the amperage charge output of the alternator in this engine? I want to charge 2 12v 85ah batteries separately one for starting and one for aux services. I have seen a 30A SPLIT CHARGE RELAY KIT - INTELLIGENT SELF SWITCHING unit on ebay ( http://tinyurl.com/6o9qrq )do you think this would be ok to use with this engine? Any help on this would be appreciated. Mark.   Graham Lamb Senior Member Username: galamb Post Number: 3922 Registered: 05-2007 Posted on Thursday, August 21, 2008 - 01:24 am:    Yes, should work fine. I think your model will have either a 9 or 16 amp system, so the relay will be more than fine...   Graham Lamb Senior Member Username: galamb Post Number: 3924 Registered: 05-2007 Posted on Thursday, August 21, 2008 - 01:38 am:    Mike that is a 1977, Yamaha built Mariner 2 stroke. 50:1 mix is perfect. Alot of parts are discontinued, however, general maintenance items are still available from a Merc dealer...   mikebronson New member Username: need_4_speed Post Number: 2 Registered: 08-2008 Posted on Thursday, August 21, 2008 - 04:04 am:    The front of the cover says its a 1250 but the back says 1100 with lightening bolts going threw it. It's a 115 hp 6 cyl. from the early 1970s. Im having trouble locateing serial #s. The only # I have found is 836-3260 Tiger. Not sure what that refers to. I need to order parts but having trouble correctly IDing this motor. Your help would be apreciated. Thanks, MIKE PS. What does the term "Thunderbolt" refer to?   Graham Lamb Senior Member Username: galamb Post Number: 3925 Registered: 05-2007 Posted on Thursday, August 21, 2008 - 06:07 am:    Mike Bronson, it's a little tough to tell exactly what you have there. The 1250's were 125 horse models (only built in 1968/69), the 1100 were 110 horse models (only built in 1966/67). If it is a 115 horse it would have been a model 1150. The "Thunderbolt" indicates that it had Merc's (new at the time) Thunderbolt ignition that replaced the earlier Phelon ignitions. The Thunderbolt, which although modified along the line, is still in use today, did away with points/condesors. It was probably the best 2 stroke ignition ever designed... I don't know what that number is that you found. The problem with Merc's is, even if you find the serial it will not help identify the horsepower and it sounds like the hood has been cobbled together from spare parts. You may have to try and find casting numbers on the carbs to ultimately identify exactly what you have there...   mike henshall New member Username: mike12361 Post Number: 1 Registered: 08-2008 Posted on Thursday, August 21, 2008 - 03:31 pm:    thanks for your info graham. as yet i don't know if we need anything other than a couple of grease nipples. however it has been stood outside for at least 2 years. started and ran ok but any advice on what to check/replace would be apreciated.   Graham Lamb Senior Member Username: galamb Post Number: 3927 Registered: 05-2007 Posted on Thursday, August 21, 2008 - 07:42 pm:    Mike, anytime a motor has sat, at minimum you should change/replace: spark plugs impellor lower gear oil fully inspect all wiring/hoses for rot/frays/breaks etc if the rpms stumble at all, at idle or anywhere else that's a good indication that the carb(s) need removal, disassembly and cleaning. Additionally, the diaphram in the fuel pump could be deteriorated, so it's something to keep an eye on. Any fuel issues, do the carbs/fuel pump....   John Hebrides Visitor Posted on Friday, August 22, 2008 - 06:44 am:    I'd be grateful to know when my 4 HP Mariner two stroke was manufactured, so I can get the correct manual. Its serial number is 09767199.   mike henshall New member Username: mike12361 Post Number: 2 Registered: 08-2008 Posted on Friday, August 22, 2008 - 10:10 am:    thanks graham that information is a big help as i have no experience with outboards but as a car/motorcycle mechanic i wil adapt fairly easily (i hope)   Graham Lamb Senior Member Username: galamb Post Number: 3933 Registered: 05-2007 Posted on Friday, August 22, 2008 - 05:37 pm:    Mike, once you get at them they are really quite simple to work on - it's just some things seem to be in an "odd place" compared to other motors you may have worked on...   ray mathis New member Username: salty1dog Post Number: 2 Registered: 08-2008 Posted on Friday, August 22, 2008 - 11:13 pm:    I have a mariner 150hp on a basscat I bought used. The boat is a 93 but I don't know about the motor. The cowling has an orange stripe and the only number I could find was oc284285. Can anyone tell what year this is or if there is another number I might find somewhere on the motor.   ray mathis Member Username: salty1dog Post Number: 4 Registered: 08-2008 Posted on Saturday, August 23, 2008 - 01:49 pm:    Afier looking at a dozen different sites I think I discovered my Mariner 150 is a 95. It's either a OC284285 or a OG284285. Not sure if it;s a C or G.   Tommi Karjalainen Visitor Posted on Sunday, August 24, 2008 - 02:49 pm:    Hi, I have Mercury 4.5, Serial 939723 - I think it's European, only charts I found were American or Australian. What year is it?   Graham Lamb Senior Member Username: galamb Post Number: 3942 Registered: 05-2007 Posted on Monday, August 25, 2008 - 05:01 pm:    Tommi, that's a 1981 model built by Merc in Belguim - same parts as US/Canadian/Aussie motors...   mikebronson New member Username: need_4_speed Post Number: 3 Registered: 08-2008 Posted on Tuesday, August 26, 2008 - 06:17 pm:    I found the serial # on this mystery motor. It's 2480805. It says 1100 with 2 lightening bolts. Does that mean its the 1100ss model? It also is a short shaft. I have redone all the wiring in the motor. What other componants should be replaced? I also checked the lower unit oil and it looked OK. I was told that all cylinders had 125 comp. except one which had alot less. Would that be rings or a leaking/blown head gasket? What else can you tell me about these motors? I appreciate all the info. MIKE   Sandy Levi Visitor Posted on Tuesday, August 26, 2008 - 06:47 pm:    What year is my Merc 110 9.8 hp, serial #1471875?   mike henshall New member Username: mike12361 Post Number: 3 Registered: 08-2008 Posted on Tuesday, September 02, 2008 - 03:34 pm:    hi graham. sorry to pester you but i am having problems. it transpired that the cable steering system on my boat was kaput so i purchased a multiflex system which arrived today, i also had to purchase a drag link to fit the engine. my main problem is that i don't have a clue where on the engine the drag link is supposed to be attatched? i have a 1977 yamaha built 40 hp mariner (thanks for that info) please help i am a complete novice when it comes to watercraft.   ALFRED NADROWSKI Visitor Posted on Friday, September 05, 2008 - 07:48 pm:    I'm looking at a boat and motor,no year on motor. I have serial #695s017235 25hp MARINER on a '71 BLUE FIN aluminum boat 16ft.Seller asking $1500. for boat,trailer,52 lb Minnkota, 25 hp Mariner motor,new canvas cover,gas tank,2 life jackets,oars. Looks clean,no major damage, I'd appreciate a Yeah, or a NEAH. What do ya think?   Greg Griswold Visitor Posted on Friday, September 05, 2008 - 08:12 pm:    I have a Mercury Classic 50, serial number 0C145168. Can you tell me what year it was manufactured? Thanks ClarkW   Graham Lamb Senior Member Username: galamb Post Number: 4028 Registered: 05-2007 Posted on Friday, September 05, 2008 - 09:30 pm:    Alfred, the motor is an 82 Yamaha built Mariner. The price for the whole package sounds ok. A new 16 foot aluminum utility may run 2k, add another 700 bucks for a trailer and a new 25 horse will go for about 3k - so 6000-7000 bucks new. But only you can decide if 1500 is fair for a 25+ year old motor and and a boat approaching 40 years old.... Greg, that is a 1989 model.   Guy48065 Visitor Posted on Saturday, September 06, 2008 - 10:22 am:    I have a Mariner 5M sn 661 034994 that I need to do some work to. I have Googled dozens of serial number guides and can't nail this one down. The manual has a revision date of 1979 so I'm assuming my motor is no older than that.   Graham Lamb Senior Member Username: galamb Post Number: 4034 Registered: 05-2007 Posted on Saturday, September 06, 2008 - 10:44 am:    Guy, that looks to be a 1976 Yamaha built "A" model Mariner. Parts are getting scarce for these. The model itself was based on Yamaha's own 5 horse (model 5BS) produced between 1973-80. Your first source for parts would be a Merc dealer and if they can't help you perhaps Yami can (if you find a patient dealer)....   Guy48065 Visitor Posted on Saturday, September 06, 2008 - 12:53 pm:    My first step is to get the right manual. Thanks for getting me the year so I don't blow $30 on the wrong one.   ALFRED NADROWSKI Visitor Posted on Saturday, September 06, 2008 - 06:10 pm:    Not to take up anymore of your valuable time,sir, but I wanted to express my thanks for the valued info and opinion on the boat and motor I enquired about.You,sir,provide a great service! Again, THANK YOU!   Mike Coble Visitor Posted on Sunday, September 07, 2008 - 12:32 pm:    What year is my Mariner 40E 6E9 L410404?   Graham Lamb Senior Member Username: galamb Post Number: 4043 Registered: 05-2007 Posted on Sunday, September 07, 2008 - 04:28 pm:    Mike that is a 1983 "C" model Mariner, built by Yamaha for Mercury...   shannon sawyers Visitor Posted on Sunday, September 07, 2008 - 07:04 pm:    i have a 85 horse power mercury trying to find the year can anyone help?serial number 4233416 thanks   Graham Lamb Senior Member Username: galamb Post Number: 4047 Registered: 05-2007 Posted on Monday, September 08, 2008 - 11:51 am:    Shannon, that's a 1975 model...   mikebronson Member Username: need_4_speed Post Number: 10 Registered: 08-2008 Posted on Monday, September 08, 2008 - 12:34 pm:    sn = 3370315 115 hp Merc. What year?   Graham Lamb Senior Member Username: galamb Post Number: 4050 Registered: 05-2007 Posted on Monday, September 08, 2008 - 12:56 pm:    Mike, 1972 model 1150...   william zadroga New member Username: dump_rat Post Number: 1 Registered: 09-2008 Posted on Monday, September 08, 2008 - 03:58 pm:    Hello! I have a mercury 65 hp 4 cylnder SR 2349598 would like to know year ty .   Jake Lamb Visitor Posted on Tuesday, September 09, 2008 - 06:58 pm:    Graham, I have 40 horse Mariner Magnum, serial OD128965. I believe this is a 1991, but am not sure. Also is it possible to find out where this motor was manufactured? Thanks, Jake   Graham Lamb Senior Member Username: galamb Post Number: 4051 Registered: 05-2007 Posted on Tuesday, September 09, 2008 - 07:20 pm:    Jake, your motor is a 1992 model Mercury Mariner assembled in the U.S. Notice I didn't say made. The power head and gears were built by Yamaha just like 99% of the Merc's out there, but the ignition system and the carbs etc are North American. Your model, except for the decals/colour is identical to a 40 Horse Mercury of the same vintage...   madhawk Member Username: madhawk Post Number: 4 Registered: 09-2008 Posted on Tuesday, September 09, 2008 - 07:39 pm:    Hi i have not been able to find the s/n on my merc.. it is a 115 HP i think it is an 86 same as the boat. Which is a 86 Glastron Carlson CVX16   Graham Lamb Senior Member Username: galamb Post Number: 4054 Registered: 05-2007 Posted on Tuesday, September 09, 2008 - 08:03 pm:    William, your 65 horse is a 1968 model..   Jake Lamb Visitor Posted on Wednesday, September 10, 2008 - 12:51 pm:    Many thanks, I've been searching for this info all over the web and have had great difficulty finding Mariner serial #s. Merc #s seem readily available, but Mariners apparently not so much.   Jim Pavia New member Username: imafishinghunter Post Number: 1 Registered: 09-2008 Posted on Sunday, September 14, 2008 - 10:53 am:    I am hoping someone can help me out....I have a Mariner 4 HP outboard with S/N 6EO 310912, can someone tell me the year of it? Thanks Jim   Graham Lamb Senior Member Username: galamb Post Number: 4070 Registered: 05-2007 Posted on Sunday, September 14, 2008 - 11:31 am:    Jim, that is a 1982 model built by Yamaha for Mercury...   Jim Pavia New member Username: imafishinghunter Post Number: 2 Registered: 09-2008 Posted on Sunday, September 14, 2008 - 11:40 am:    Thanks for your help, would I contact Yamaha or Mercury for a manual?   Graham Lamb Senior Member Username: galamb Post Number: 4072 Registered: 05-2007 Posted on Sunday, September 14, 2008 - 08:47 pm:    Merc - the is still a Merc product regardless of who built it. Today's small Merc's are built by Tohatsu....   Bryce Clark Visitor Posted on Wednesday, September 17, 2008 - 10:52 am:    Good morning! Purchased my first boat, jon boat, with a 9.8 Mercury 110 (Or at least that's what I'm told). The serial number is 941-2624. Can anyone direct me to how I can verify what yr the motor is? Thanks!   Bryce Clark Visitor Posted on Thursday, September 18, 2008 - 04:04 pm:    One more question on my Mercury 110. I am getting a small amount of a leak in my garage. It is dark and oil-like. I had my boat mechanic look at it and he said it is an exhaust drainage from the 2-stroke oil gas mixture. (I was thinking it was my lower unit lube.) Does this sound correct that it would be the residue of the oil gas mix and not the lower unit? The mechanic pulled the screw in the lower unit and said it had plenty of fluid.   ikia Visitor Posted on Thursday, September 18, 2008 - 05:46 pm:    lower unit leaks are found / determined with a pressure test.Have the local mechanic do this for you.   diver dave Member Username: diver_dave Post Number: 43 Registered: 08-2008 Posted on Monday, September 22, 2008 - 11:05 am:    I have a ser # OB390324 on a 15 HP. Is the year a 1989? TIA   ATPFISHER Visitor Posted on Thursday, September 25, 2008 - 01:17 am:    Hello, I just bought a 4hp. Mariner serial #6EOS 008259. My question is of course what year? and correct fuel mixture?. Thanks for your time.   jjamieson Visitor Posted on Saturday, September 27, 2008 - 08:27 am:    Can you tell me the year and size of this engine please Mercury Mariner OB343528   jjamieson Visitor Posted on Sunday, September 28, 2008 - 05:12 pm:    Think the Ser. No. is 08343528 Thanks.   jjamieson Visitor Posted on Monday, September 29, 2008 - 07:57 am:    Sorry about this the serial no. is OB343528.   Graham Lamb Senior Member Username: galamb Post Number: 4119 Registered: 05-2007 Posted on Tuesday, September 30, 2008 - 10:14 am:    What's the horsepower - Merc serials are just a production number (no info embedded). So need the hp to compare the number against the production lists for that model to get the year... If you don't know the horsepower, then it's time to play detective. How many cylinders? How many carbs? (or is it fuel injected)?   jjamieson Visitor Posted on Tuesday, September 30, 2008 - 11:08 am:    Hi, 6 cylinder 3 carbs 115 hp says oil injected on cover but is not, Thanks   Graham Lamb Senior Member Username: galamb Post Number: 4121 Registered: 05-2007 Posted on Tuesday, September 30, 2008 - 11:59 am:    That makes it a 1988 model, one of the last runs of the inline 6 type. A year of so later the 115 became a 4 cylinder motor.   jjamieson Visitor Posted on Tuesday, September 30, 2008 - 12:16 pm:    Many thanks for your help.   Steven Jones New member Username: stjnes Post Number: 1 Registered: 10-2008 Posted on Sunday, October 05, 2008 - 10:47 pm:    Hi I just purchased a 20hp mercury, the ser# is OD217003, would you be able to tell me what year it is, and where i could get a manual for it? Thanks steven   Steven Jones New member Username: stjnes Post Number: 2 Registered: 10-2008 Posted on Sunday, October 05, 2008 - 10:57 pm:    I made a mistake, the ser# is OB217003,(20hp) the eyes aren't what they used to be   Chris New member Username: stormdad Post Number: 1 Registered: 10-2008 Posted on Monday, October 06, 2008 - 03:05 pm:    Hello, Mercury 2 stroke 35 HP Oil Injected outboard. Serial # OB205529 Have done online look ups and this serial # appears nowhere. Need Manuals and Parts, just don't know the year. Engine runs well but needs some work.   mikebronson Member Username: need_4_speed Post Number: 13 Registered: 08-2008 Posted on Wednesday, October 08, 2008 - 12:54 am:    Hi. I was told it was a 125 hp but it says 115 hp on the cover. Serial# is 3763434 Mercury. Thanks, MIKE   HowardIngham Visitor Posted on Wednesday, October 08, 2008 - 04:46 pm:    Hello, I have a Mariner 30 ELO 689 L 420705. What year is this? Thanks   Blindeman Patrick Visitor Posted on Saturday, October 11, 2008 - 12:20 pm:    Hello, I have a Mariner 4 ML 6 EO L 332722 What year? Thanks Patrick Belgium   Blindeman Patrick New member Username: pinkio Post Number: 1 Registered: 10-2008 Posted on Sunday, October 12, 2008 - 06:40 am:    Hi, did find an answer to my problem! For all those searching : look at http://www.marinshopen.se/Hj%C3%A4lpmedel/Modellguide/tabid/74/Default.aspx   jeff spencer Visitor Posted on Monday, October 13, 2008 - 07:14 pm:    Hi Graham, looking for the year on my Mercury? Its a 3.6hp, ser # 6191639 Also looking for the fuel/oil ratio. Thanks for the help...Jeff   Graham Lamb Senior Member Username: galamb Post Number: 4130 Registered: 05-2007 Posted on Monday, October 13, 2008 - 11:50 pm:    Jeff, that's a 1982 model. Mix at 50:1 - regular unleaded and Marine TCW3 rated oil...   jeff spencer Visitor Posted on Tuesday, October 14, 2008 - 06:46 am:    Thanks Graham, any idea as to where I can get a manuel? I want to change the lower unit oil, but there are no vent and drain plugs?   mikebronson Member Username: need_4_speed Post Number: 15 Registered: 08-2008 Posted on Wednesday, October 15, 2008 - 03:40 am:    Graham, I was hoping you could help me with this. Hi. I was told it was a 1985. It is a 1150. Can you share some pros and cons and any other knowledge about this motor, please. Serial# is 3763434 Mercury. Thanks, MIKE   Len Hoppe New member Username: happyhoppie Post Number: 1 Registered: 10-2008 Posted on Sunday, October 19, 2008 - 08:36 am:    Can I find out what year my motor is and also a good manuel. I brought m boat up to colorado from Florida and it doesn,t seem to run right I think I need to re jet but not sure so any thoughts would be welcomed aswell. The SN I took off the mounting plate was SN 0d267717 I was told when I bought it that it was the first year of the oil injected 40 hp 4 cylender. Any help will ,well, help thanks.   Peter Lyle New member Username: paydro Post Number: 1 Registered: 10-2008 Posted on Thursday, October 23, 2008 - 08:28 pm:    Hi, I've got a Mercury 9.9 S/N 6475649. Any clue?   Graham Lamb Senior Member Username: galamb Post Number: 4151 Registered: 05-2007 Posted on Friday, October 24, 2008 - 04:20 am:    Sorry guys - been busy... Mike - someone lied - that's a 1974 model, inline 6 "tower of power". They have quite a following among owners, they are however "old" and parts can be somewhat difficult to find and expensive when you do find them. Rated in BHP (brake horsepower) the 1150 (115 horse) is the equivalent of about 90 horses in the modern SHP rating used now. Len - that is a 1993 model - nice motor - a good all around manual for maintenence and repair is Selocs for 3 and 4 cylinder models of that vintage. Peter - that serial is for a 1984 9.8 horse model. The 9.9's didn't come out until 1986 and all had the (new) alphanumeric serials begining 0A123456 etc...   Steve Tee New member Username: poppajoe Post Number: 1 Registered: 11-2008 Posted on Monday, November 03, 2008 - 05:41 pm:    Hi, Could you please date my motor, it appears that Mariner are complicated to do so, its a belguim made model, 25hp four stroke MOD: BE5BFLCUD ser nr: B 1521507. Help would be appreciated, thanks, Steve   Graham Lamb Senior Member Username: galamb Post Number: 4167 Registered: 05-2007 Posted on Tuesday, November 04, 2008 - 12:45 am:    Steve, that is newer than my most recent production lists (2004). The production year should be on the sticker where you got the rest of that info - if it's missing you may have to contact Merc for the info.   Steven Bogar New member Username: bogie Post Number: 1 Registered: 11-2008 Posted on Friday, November 07, 2008 - 09:14 pm:    I am new here, so I apologize if I'm in the wrong posting area. I just picked up a 3cyl 90HP oil injected Mariner with a serial # OB131895. Could someone tell me the year model I've got. Thank you in advance.   michael gegg New member Username: mgegghotmailcom Post Number: 1 Registered: 11-2008 Posted on Saturday, November 08, 2008 - 12:10 pm:    I have a mercury 50hp outboard and was told it is either an 83 or an 86 from the previous owner. A serial number is missing from the motor and I need to know the correct year to order parts. What things can I look for to determine which year the motor is. Keep in mind I dont know my way around a boat motor. I am having my doubts as to the years I was told because I recently ordered a switch assembly that should have been good for either year and it is the wrong part. Any help would be awsome. Thanks.   Trent New member Username: hillrun1 Post Number: 1 Registered: 11-2008 Posted on Friday, November 21, 2008 - 10:18 pm:    Since I called Mercury and they couldn't answer my question, I will ask you guys. My son bought a 1980 21' Omega with a 225 Black Max on the rear end. The serial number is 5000633. Can anyone tell me the year of the engine? Part two of my question, is that I am thinking about trading him for my 1996 Merc 125 on my 24' pontoon boat. Has anyone put a 225 on a pontoon and any insight would be appreciated.   Joe mITCHELL New member Username: mrhaneysr Post Number: 1 Registered: 11-2008 Posted on Saturday, November 22, 2008 - 05:30 pm:    I just got a Yamaha Outboard that is missing the cover and will need lower bearings replaced. The numbers I could read are 69E 6E900 L C4OPLRS 333908 I need the year made Type and a source for parts and manual. Thanks Mr Haneysr   Alan Taylor New member Username: altater454 Post Number: 1 Registered: 11-2008 Posted on Sunday, November 30, 2008 - 07:51 pm:    I have a 40 hp mercury outboard, elect. start, tiller handle with oil injection. S.N. OD267698 What year model is it? Thanks for any help.   Shawn Kennedy New member Username: shawn_in_kuwait Post Number: 1 Registered: 12-2008 Posted on Friday, December 05, 2008 - 03:27 am:    Hey there, need some help. I am in Kuwait the land of ebonic engineering and am trying to fix my 200 hp merc outboard. Don't knowwhat year it is for sure and the id tag is mangled. All I cn read is OG 83667... the rest is cut off. 200 hp, 390 lbs. v-6 three carb. numbers on the #1 carb are 39 1 3233 on the side and 3311-821687 C on top. it is a 2.5l also. I have no midrange when I throttle. I have slow and fast. When I go to mid the engine dies. I have had three mechanics look at it with no results. I myself am a heavy equipment and turbine engine repairman so 2 strokers are a mystery to me lol. I am pushing a 20ft. speed/dive boat. Any help would be appreciated!! thanks in advance! Shawn   Phillip Craggs New member Username: detox Post Number: 2 Registered: 01-2009 Posted on Monday, January 05, 2009 - 05:38 pm:    Hello all. new here. I'm going to ask for some help. And this looked like the best thread to ask it in. I'm looking to fix up a Mercury 80HP, but like with alot of people, I can't find out what year it is. Know, from the info I've gathered over the net so far, is that it should be between a 87-93. The serial number is 3312540. Any info would be great. Thankv very much.   Graham Lamb Senior Member Username: galamb Post Number: 4345 Registered: 05-2007 Posted on Monday, January 05, 2009 - 11:42 pm:    Phillip, you should have started a new discussion, your question almost got lost here in the big pile. Anyhow, I believe your motor is considerably older than what you suspect. That serial would make it a 1972 model. Is this a 3 or 4 cylinder motor?   Phillip Craggs New member Username: detox Post Number: 3 Registered: 01-2009 Posted on Tuesday, January 06, 2009 - 05:56 am:    Oh, well I seen the title of the thread and thought this was an open question area. But, it is a 3cyl. two stroke. thanks for the response.   rod macqueen New member Username: rawd Post Number: 1 Registered: 01-2009 Posted on Tuesday, January 06, 2009 - 11:08 am:    OK--another 40 mariner-yamaha built 40ELO 6E9L 433158(originally purchased in Canada I believe) first: what year is it? second: how does the oil injection work--is it separate unit? because it is not there Third: what should the compression be?   Graham Lamb Senior Member Username: galamb Post Number: 4354 Registered: 05-2007 Posted on Tuesday, January 06, 2009 - 11:40 am:    Ok Phillip, the three cylinders didn't come out until 1987 - any chance the first "3" in your serial is actually a "B" which would make it a 1988 model. Rod, that's a Yamaha built Mariner. 1989 model - originally equipped with an "auto-blend" oil system - was a separate unit that failed so often that it killed more outboards than all other problems combined. You should be thankful that someone removed it and threw it far enough away from the motor that it couldn't spontaneously reconnect and kill it. Mix at 50:1 with regular unleaded and TCW3 rated 2 cycle marine oil. For compression, I would be looking for about 100 psi plus/minus 10.   Phillip Craggs Member Username: detox Post Number: 4 Registered: 01-2009 Posted on Tuesday, January 06, 2009 - 04:54 pm:    Ok, I are feeling stupid. Just to be sure I decided to go out in the cold and take a closer look at the engine. Apparently, there is a forth cylinder tucked up under the shroud. Sorry for the misunderstanding. So that would make it the 1972 model?   steve smith New member Username: astroglass Post Number: 2 Registered: 01-2009 Posted on Tuesday, January 06, 2009 - 08:18 pm:    70 hp merc with serial number 5285869, what year, was told an 80 model   Shawn Kennedy New member Username: shawn_in_kuwait Post Number: 2 Registered: 12-2008 Posted on Tuesday, January 06, 2009 - 10:07 pm:    Think I got missed in the jumble so I re-posted: Hey there, need some help. I am in Kuwait the land of ebonic engineering and am trying to fix my 200 hp merc outboard. Don't knowwhat year it is for sure and the id tag is mangled. All I cn read is OG 83667... the rest is cut off. 200 hp, 390 lbs. v-6 three carb. numbers on the #1 carb are 39 1 3233 on the side and 3311-821687 C on top. it is a 2.5l also. I have no midrange when I throttle. I have slow and fast. When I go to mid the engine dies. I have had three mechanics look at it with no results. I myself am a heavy equipment and turbine engine repairman so 2 strokers are a mystery to me lol. I am pushing a 20ft. speed/dive boat. Any help would be appreciated!! thanks in advance! Shawn   Graham Lamb Senior Member Username: galamb Post Number: 4356 Registered: 05-2007 Posted on Tuesday, January 06, 2009 - 11:45 pm:    Phillip, yes that will make it a 72 model. The 4 cylinder was a fairly "gutsy" engine. But it is getting on in years and not all parts are still readily available. On the positive side kits are still available for the carbs (which are sidebowl back-draft style - old but quite functional). On the down side, this uses a distributor in the ignition which is no longer available and was super expensive when it was, so a major ignition issue would leave you with a motor that, in my opinion, wouldn't be worth trying to fix. Steve, that is a 1979 model although it may well have been sold as a "new" 1980 model if it was left over stock. Merc "serials" are actually production numbers and are not encoded for a specific year. To determine what year it was mfg, the number is compared to a production list - so technically if that motor had of sat in the dealer for 3 years, it could have easily been sold as a "new" 1982 model as well and the warranty would have started at that point. Shawn, you are best to go to the top of the page and start a "new discussion" and post your question. There are a couple of guy on this site that are very well versed in higher horsepower motors, but they will never see your question in this mess. I don't have my "newer" production lists close by at the moment, but can tell you from what you have of your serial there that the motor is relatively new (less than 10 years old). My first thought would be bad check valves or clogs in the bleed system between the carbs/reeds and the crankcase - but as stated, there are some really excellent "big" engine mechanics on this site who can give you a decent place to start - so do repost as a new thread...   Phillip Craggs Member Username: detox Post Number: 5 Registered: 01-2009 Posted on Wednesday, January 07, 2009 - 06:56 am:    This is going to give me something to think about. Even though she still runs very stong. The wiring has seen better days, along with that, the bottem carb needs a rebuild(leaks). Thanks very much for the info, Phillip   rod macqueen New member Username: rawd Post Number: 2 Registered: 01-2009 Posted on Wednesday, January 07, 2009 - 08:51 am:    Thanks Graham one more:is there an adjustment on the mounting bracket for transom height on that 89 mariner 40? I couldn't see how but someone told me they will adjust a little(there is no power tilt/trim on this engine) thanks again   Graham Lamb Senior Member Username: galamb Post Number: 4363 Registered: 05-2007 Posted on Thursday, January 08, 2009 - 12:11 am:    Rod, there is no adjustment for transom height. From your serial I can tell this is a long shaft meant for a 20" transom - no way to adjust that. There is a tilt pin (actually called a thrust pin) with a series of holes so that you can "trim" the motor to what works best, but that's the extent of it as far as "adjustments" go on this model...   rod macqueen New member Username: rawd Post Number: 3 Registered: 01-2009 Posted on Thursday, January 08, 2009 - 07:47 am:    Thanks again Graham   Dennis Disney New member Username: fxdiz Post Number: 1 Registered: 01-2009 Posted on Thursday, January 08, 2009 - 10:14 pm:    Hello. I have a Mariner 50 S/N 5870242. Can you tell me what year it is. I bought a SELOC repair manual in the hopes it would list the s/n to year, but if it does, I can't find it.   Graham Lamb Senior Member Username: galamb Post Number: 4372 Registered: 05-2007 Posted on Thursday, January 08, 2009 - 11:43 pm:    Dennis, that is a 1980 Mercury built Mariner. If you got the Seloc's manual for Mariners, you got the wrong book. Two different Mariners out there (both Merc products). Seloc's Mariner manual is for Yamaha built models and Seloc's Mercury manual is for Mercs and Merc/Mariners (which yours is)....   gordon webb Member Username: ktmjunkie Post Number: 11 Registered: 01-2009 Posted on Friday, January 09, 2009 - 03:47 pm:    Graham,, any idea on this one buddy, 50hp 4cyl 2stroke belgium. 9282468 B4822   Graham Lamb Senior Member Username: galamb Post Number: 4380 Registered: 05-2007 Posted on Saturday, January 10, 2009 - 11:55 pm:    Yep - that's a 1980/81 model (they lumped that two year time frame into one production list). I actually have excellent Belgian records - my Canadian and Aussie records are slightly lacking though...   Paul Dolan New member Username: paul_dolan Post Number: 1 Registered: 11-2008 Posted on Sunday, January 11, 2009 - 08:46 am:    Hi Folks, I'm trying to identify and obtain parts for the following mariner 40hp:- 6E9 S019798 40M Judging from previous posts i understand it is a yamaha built shortshaft 40hp I'm looking for a coil and also plug specs. Who do i find parts off yamaha or mariner? which part number (for the coil) do i use? will a pattern part do the job? I had to shorten one of the plug HT leads and now will not reach plug. Thanks Paul in Ireland   Noel McBride Advanced Member Username: haventaclue Post Number: 122 Registered: 05-2007 Posted on Sunday, January 11, 2009 - 10:56 am:    Hi Paul,If you can get a # for the same part off a yamaha it is usually cheaper,www.marineparts.ie are good, they do the Sierra parts,and you will also be able to get a HT lead there as well.I usually order from the States,www.dougrussell.com and others. You could get a Seloc manual here on this site reasonably enough which is necessary if you're going to work at the motor yourself,believe me I've been there.   Lee Vue New member Username: leevue Post Number: 1 Registered: 01-2009 Posted on Sunday, January 11, 2009 - 01:18 pm:    Hello Graham, I have a Mariner outboard motor and I want to find out what year it is? Also want to know the correct oil ratio. Thank you in advance! Model: 5M Code: 6E3 Serial#: 150173 Lee   Graham Lamb Senior Member Username: galamb Post Number: 4389 Registered: 05-2007 Posted on Monday, January 12, 2009 - 01:45 pm:    Lee, that is a 1986 "C" model. 5 - horse M - manual (pull or rope) start 6E3 - Yamaha model based on their own model 5C which began production in 1980...   Paul Dolan New member Username: paul_dolan Post Number: 2 Registered: 11-2008 Posted on Monday, January 12, 2009 - 02:18 pm:    Hi Graham, I'm trying to identify and obtain parts for the following mariner 40hp:- 6E9 S019798 40M Judging from previous posts i understand it is a yamaha built shortshaft 40hp manual start i've no clue of the year though I'm looking for a coil and also plug specs. Who do i find parts off yamaha or mariner? which part number (for the coil) do i use? will a pattern part do the job? Can you recommend a workshop manual? I had to shorten one of the plug HT leads and now will not reach plug. Do you get paid for this? Thanks Paul in Ireland   Graham Lamb Senior Member Username: galamb Post Number: 4391 Registered: 05-2007 Posted on Monday, January 12, 2009 - 07:14 pm:    Paul, to start with that is a 1985 "C" model Mariner. Built by Yamaha for Mercury and intially marketed in Europe/Asia/Australia although it was a very popular model and alot made it over to North America. The 6E9 tells you it was a carbon copy of Yamaha's own model 40FM which was built between 1981-83. This was common with the Yamaha built Mariners (there is a whole line of Mercury/Mariners which are just Merc's with the Mariner colour/decals - which I own a 15 horse of that flavour). They were basically just a Yamaha model that had been discontinued by Yami, but stayed in production for Merc - which among other things, gave Yamaha a place to get rid of all the leftover parts. Don't get me wrong - these are not a budget or junk motor, they were just "old technology" the day they hit the showroom. I do not have parts listings for Yami's built before 1984 so can not look up parts for Yami's own model of that motor. You can go to any Merc dealer with your model number for parts, and can look up the part numbers yourself (and see if still available) by following this link exactly www.mercruiserparts.com/selectDocs.asp?doc_nbr=814840 An excellent all round manual for this motor is Seloc's manual for "Mariner Outboards" for 1-2 Cylinder models 1977-1989 (available from this site in both electronic/printed form or most dealers for about 35 bucks). You can get a new piece of spark plug lead from almost any marine supply (don't use automotive - no good) and reattach your existing ends - they sell it in bulk for a few bucks a foot. And NO, all my forum advice (and the hours I spend giving it/researching issues) is free. And what do you get for free? I'm not a certified tech, I don't do warranty work and I don't charge 100 bucks an hour if you are close enough to bring your motor into my home based shop. Additionally, I do not claim to know more than your local dealer, the mfg, or any certified tech. But I will work on motors built before 1994 and don't consider them "old" unless they have points/condenser. I work on motors because I like to and write here because I'm semi-retired and it helps take up some time and keep my troubleshooting skills sharp I own 5 outboards - 3 Merc's and 2 OMC ranging in horsepower from 2.5 - 140 Personally I specialize in 25 horse and under Merc's produced after 1986 but have service manuals for Merc/OMC/Honda/Yamaha/Clinton outboards, Mercruiser/Volvo I/O sterndrives and small engine service manuals for Tecumseh and Briggs, so with a bit of looking can take a poke at most anything...   Tom W. Farley New member Username: tomfarley55 Post Number: 1 Registered: 01-2009 Posted on Friday, January 23, 2009 - 12:45 am:    Hello, first time poster. Seems to be the question of the day is year ID, I have a Mariner 25 with a ser # of 690 s 000235. Not sure of the year. It has manual start, wanting to upgrade to electric. Possible or cost prohibitive?? Thanks in advance Tom   Graham Lamb Senior Member Username: galamb Post Number: 4427 Registered: 05-2007 Posted on Friday, January 23, 2009 - 02:48 pm:    Tom, that's an old one - 1978 - only produced the 690 series in that single year. This was a 100% Yamaha built motor and they dressed one in their own colours/decals in 1979 (only) and marketed it as the model 25B. In fact, it is so unique Merc doesn't even have a parts listing for that particular model. So while I can't even give you info as to whether parts are available to convert it to electric start, I can give you a general idea of what it "typically" costs. A starter motor is 100-200 bucks. If you need a ring gear (teeth for the flywheel) add another 50-75. A starter solenoid is about 35 bucks, add some wire, fuse, a couple battery cables and a battery (maybe $125), the price tag could reach 400 bucks or better, if you can find parts and do the work yourself - otherwise add about 200 for labour. The cost of the conversion, without labour is greater than the value of the motor. The only time it's really cost effective to get an electric start, is when the motor is brand new - you really need to buy it that way.   Greg New member Username: firedog27 Post Number: 2 Registered: 01-2009 Posted on Sunday, January 25, 2009 - 03:50 pm:    I have a Mariner 40 Hp Magnum motor and need the serial number on it to order carb. rebuilding kit. I think its a 1992 model, but not for sure. I did find a serial number tag on the motor mount beside the tilt& trim that has the numbers 09700536 on it. But I am being told that it should have a letter in it. Is there any other place that I can look to get this info. and can anyone give me a year for this engine by the numbers above. Thanks   Paul Dolan New member Username: paul_dolan Post Number: 3 Registered: 11-2008 Posted on Monday, January 26, 2009 - 04:40 pm:    Graham, I posted about two weeks ago regarding a 40hp mariner. i'm just thanking you for your comprehensive and informative reply. Thanks Paul in Ireland   Marty New member Username: marty_c Post Number: 1 Registered: 01-2009 Posted on Monday, January 26, 2009 - 10:22 pm:    Great forum. I just bought my first boat and motor and I'm learning a ton. I have a 20 HP Mariner, Serial # A906325. What is the year? With the year I will be able to find out the other ?'s on another post. Thank you   Graham Lamb Senior Member Username: galamb Post Number: 4432 Registered: 05-2007 Posted on Tuesday, January 27, 2009 - 02:33 am:    Marty, that was built in 1985 but would have been sold as a 1986 model. For the 1986 model year, Merc changed their serials from all numbers to adding a (zero) followed by a letter - in this case "A", followed by the production (serial) number. Your particular model saw almost no change parts wise upto and including the 1994 model year - so lot's of spare parts around. Outstanding motor by the way - probably the best 20 horse 2 stroke ever produced by any mfg...