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Trying to find info on motor

C

chucklz4225

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I've got a 9.9 Mariner. Th

I've got a 9.9 Mariner. The id plate reads "Mariner 9.9m 682CS - 022896". I'd like to find out the year of this motor. I know it was produced by Yamaha. I'd also like to find out what the fuel ratio mixture is. I started out at 50:1 and fouled my plugs. I then went to 60:1 now it only fouls the bottom plug after about 3 to 4 hours of use. Any ideas would be greatly appreciated. Thank you
 
"Charles, that's a 1981 Ya

"Charles, that's a 1981 Yamaha built Mariner. Should mix at 50:1.

Are you running NGK B7HS plugs gapped at .024"

If not that could be the cause of your fouling.

Alternately, if it's a oil foul your carb could need a minor adjustment or you may be missing or have a bad thermostat - running too cold can also cause a foul."
 
"I purchased boat with 2 Marin

"I purchased boat with 2 Mariner outboards, 150 hp. Ser #'s are OC126303 and OC127023. What can you tell me about them? I was told they were 1989 year. Are they V6 or in line 6cyl. (I can't see as they are 100 miles away. Am looking for best "Manual" for this pair. Any suggestions? Thanks"
 
"I can tell you they look just

"I can tell you they look just like Merc's only they are a grayish-silver colour


Seriously, they are both 1989 Mercury/Mariner, 2.0 litre V6 models (same as the Merc XR2/XR4 "Black Max" models as far as parts go).

Seloc's makes a decent maint/repair manual for them for about 35 bucks (you would want the book that covers V6 "Mercury" models - not Mariner).

Or you could stop at a Merc dealer and have them order a Service Manual (usually about 80 or 85 bucks) which is more precise to the motors, but assumes it will be used by a "tech", so unlike the Seloc's, it will "assume" that you already have a sound knowlege of what you are working on, where the Seloc's gives you tricks/tips etc.

I personally, really like Merc's 2.0 litre V6 models and this would be my first choice in the 135/150 horse class, but the slightly newer 2.5 litre XR6 models were a little better suited to producing 150 horses which give the motor itself a slightly longer life expectancy before a rebuild is required."
 
"Graham, thank you for the res

"Graham, thank you for the response on my 2 Mariner 150's. When I order replacements for the stator and the trigger coils, do I use Mercury or Mariner to find the correct part. The ones on the engine have been replaced so I don't want to use a "wrong" number. The prior owner said the engine had blown a stator and/or trigger a short time ago and now with "no high-voltage, I may have the same problem...or something is wrong that keep blowing them. He said they went bad when he had a bad battery cell and flipped his battery switch. Oh, I gotta pass a recent experience I had on one of my mercruisers. Gotta go find that post. You're a breath of fresh air when it comes to giving advice and counsel. Keep it up. The Bottlenose said that!!"
 
"Use them "Mercury" nu

"Use them "Mercury" numbers. It just saves confusion.

Although the Yamaha/Mariners never came in that high horsepower, it's just easier to say they are Mercs..."
 
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