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8hp Mariner model year?

You have a Yamaha built Mariner.

Merc contracted the building of these from Yamaha. Yamaha used 100% Yami parts and designs and simply dressed them as Mariners for Merc. They were "mechanically" a Yamaha model, usually discontinued, by the time the Mariner came to market.

Your particular model was built in 1983, the last year of the model run for that 8 horse model.

Your run of numbers break down as follows:

8M - obvious - an 8 horsepower with M representing a "manual" (or rope) start - so was not an electric start from factory

677 - is a Yamaha model code indicating that this is a clone of a 1977 model 8B Yamaha outboard

S - short shaft - designed for a 15" transom

052553 - the (actual) serial number indicating it came off the production line in 1983.

So mechanically a 1977 model but marketed as a 1983 Mariner. That doesn't mean "inferior", just was no where near "leading edge", so it sold as a discount motor compared with either an 83 Mercury or Yamaha outboard.

In 1984 the model changed and was then based on the (newer) Yamaha model 8C.

Merc lists this model as an 8B Mariner. Many parts are mostly discontinued and very scarce. However, depending on the model of the carb on your motor you may be able to get a kit for it (early carbs on this model have zero parts support). Parts for the water pump are generally available and likewise, the ignition components still can be found but they are very expensive (you might spend twice what the motor would be worth by simply replacing an ignition coil).
 
Hi Graham, I too have just acquired an old motor, Mariner 8 serial 677 352170
I purchased an old Coronet 20 Trailer-sailer as a restoration project and the motor came along with the deal.
I cannot find any suitable owner manual online and want to take the top cover off, check and change as necessary plugs, filters etc. but cannot take the cover off.

I have managed to unclip the cover at the throttle end but thought that it would come off from the prop end to get past the pull start handle. ? Don't want to force and I know I'll get there but maybe you can direct me to where I can find the appropriate owner/ tech manual ?

Any help is appreciated, in advance.

Dennis
 
walesdennis said:
Hi Graham, I too have just acquired an old motor, Mariner 8 serial 677 352170
I purchased an old Coronet 20 Trailer-sailer as a restoration project and the motor came along with the deal.
I cannot find any suitable owner manual online and want to take the top cover off, check and change as necessary plugs, filters etc. but cannot take the cover off.

I have managed to unclip the cover at the throttle end but thought that it would come off from the prop end to get past the pull start handle. ? Don't want to force and I know I'll get there but maybe you can direct me to where I can find the appropriate owner/ tech manual ?

Any help is appreciated, in advance.

Dennis
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Looks like your 8 ML serial number is within serial number range 677-352106 - 677-367080 which makes it an 1981 engine year.

The OEM service manual part number would be 90-14679 that fits 8B (677)/W8 (677)/Marathon 8 (677) 9.9C (682)/15C (684)
(I) All serial number ranges.

Hope this helps, good luck.
 
boat_tech said:
Looks like your 8 ML serial number is within serial number range 677-352106 - 677-367080 which makes it an 1981 engine year.

The OEM service manual part number would be 90-14679 that fits 8B (677)/W8 (677)/Marathon 8 (677) 9.9C (682)/15C (684)
(I) All serial number ranges.

Hope this helps, good luck.[/You are 'the man'
, thanks. Now I need to find a service manual. :) ]
Click to expand...
 
Please help me identify the year of my Mariner 8 hp longshaft. Is there an owner/service manual available? Thank you.

8ML 6G1 L 514522
 
Are you sure the last part is 514522 and not 314522?

The serials starting with "5" were used on Electric Start (from factory) long shaft motors and they didn't make any in this model run. Those starting with "3" would be a manual longshaft which is otherwise indicated in your number:

8 - horsepower
M - manual (rope start)
L - longshaft

6G1 - Yamaha identifier making it "mechanically" a 1982 C model Yamaha

L - reiterates it's a longshaft (20" transom)

514522 (again suspect 314522) would make it a 1985 Mariner "C" model (last year of production was 1986 and Yamaha only made their own C model for a single year, 1982, so has been orphaned for a while).
 
Greetings
I have a Mariner 8M 677 S 034669 engine, and I need the part number for the water pump impeller, if anyone has it please
 
Bust Out Another Thousand said:
Looking for the year and part number for the upper ignition coil on a Mariner 8M 677 S 054481
Click to expand...
054481 seems to come up as an 1978 MARINER SANSHIN 8 M, Model Number 7008208.

If correct, item number 20,

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NOS GENUINE Mercury Quicksilver 11441M Ignition Coil FACTORY NEW OLD STOCK OEM | eBay

Here is a NOS GENUINE Mercury Quicksilver 11441M Ignition Coil FACTORY NEW OLD STOCK OEM. Box only opened for pics; package is still sealed.
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CDI Electronics | Outboard Motor Parts | Ignitions | Marine Engine Diagnostic System | Stators | Ignition Packs | Regulators | Coils | Wiring Harnesses

| Outboard Motor Parts | Ignitions | Marine Engine Diagnostic System | Stators | Ignition Packs | Regulators | Coils | Wiring Harnesses
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Thanks for the quick reply but the part you have listed has 1 coil for both cylinders. My 8M has 2 coils, 1 for upper cylinder and 1 for lower cylinder. Stamped on it is CM61-26. Only other #'s on it are A U 306. Found some parts with this # but I'm just trying to make sure I'm buying the right part
 
Bust Out Another Thousand said:
Thanks for the quick reply but the part you have listed has 1 coil for both cylinders. My 8M has 2 coils, 1 for upper cylinder and 1 for lower cylinder. Stamped on it is CM61-26. Only other #'s on it are A U 306. Found some parts with this # but I'm just trying to make sure I'm buying the right part
Click to expand...
Okay, my mistake and thanks for the confirmation feedback…I trusted another way to look up parts and it didn’t seem to work out so here is another optional way to look into finding parts for your engine from mariner though hopefully boscoe will also share his parts sources as well to help give you an additional option.

Check out both/all of item numbers 29 and 30 also search the part numbers on eBay and the other linked site in our posts above from CDI to see if maybe.



Also the engine year chart shows the year to be,
​
8B M677-05187 -1983
S = Short Shaft…
 
Last edited:
galamb said:
Are you sure the last part is 514522 and not 314522?

The serials starting with "5" were used on Electric Start (from factory) long shaft motors and they didn't make any in this model run. Those starting with "3" would be a manual longshaft which is otherwise indicated in your number:

8 - horsepower
M - manual (rope start)
L - longshaft

6G1 - Yamaha identifier making it "mechanically" a 1982 C model Yamaha

L - reiterates it's a longshaft (20" transom)

514522 (again suspect 314522) would make it a 1985 Mariner "C" model (last year of production was 1986 and Yamaha only made their own C model for a single year, 1982, so has been orphaned for a while).
Click to expand...
I came across this site and hope you can fill in some info I'm trying to find. I recently retired and find a local little John boat to float the river and fish . I think it's a Mariner it's manu plate say M8 647 s28172 . When I start it in a test tub, it runs fine for about 2 minutes and then dies, although I still have fuel present. I am thinking I have bad coil packs. Can you tell me the model yr and if my assumptions are correct and if I can get coil packs for it. Thanks in advance.
 
phylip99 said:
I came across this site and hope you can fill in some info I'm trying to find. I recently retired and find a local little John boat to float the river and fish . I think it's a Mariner it's manu plate say M8 647 s28172 . When I start it in a test tub, it runs fine for about 2 minutes and then dies, although I still have fuel present. I am thinking I have bad coil packs. Can you tell me the model yr and if my assumptions are correct and if I can get coil packs for it. Thanks in advance.
Click to expand...
Can you confirm that the data plate is showing 647?

Why did you not start a new thread?
 
phylip99 said:
I came across this site and hope you can fill in some info I'm trying to find. I recently retired and find a local little John boat to float the river and fish . I think it's a Mariner it's manu plate say M8 647 s28172 . When I start it in a test tub, it runs fine for about 2 minutes and then dies, although I still have fuel present. I am thinking I have bad coil packs. Can you tell me the model yr and if my assumptions are correct and if I can get coil packs for it. Thanks in advance.
Click to expand...
Boscoe, sorry for taking so long to reply. I have a pic I took of the Manu. plate, but your site is telling me your server says the file is to big, so I tried zipping the folder to reduce the size and it didn't like that either. The sticker says Mariner 8 647 S 28172 . I tried replying to your return mail you sent me back earlier and got a reply back that I needed to respond in the forum, which I have done. The pic opens up in the reply I sent back to your return email , if you can access it, or we might be able to come up with another way , maybe a text message with an attachment. Let me know.
 
Closest Yamaha would be a 1984 8SN or 8LN. Fuel pump appears to be integral with the float bowl.

Take a look at the Yamaha US website and see if your motor looks like what you see in their parts catalog.
 
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