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  1. #1

    Running rich in two cylinder

    I just changed my plugs for the second time and they are covered with oil/fuel again. Is it possible I have 2 bad coils? Click image for larger version. 

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  2. #2
    powerstroke specialist mikegp's Avatar
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    1200r or 1300r? with one its lean? if its what it looks 1/2/3 if #3 is the one lean , you may have a bad rear seals. the two on the left don't look like they are too rich, they look fine depending on how long you idle the engine before shutting down.

  3. #3
    Mike it's a 1200r, the two cylinders in question are 2 and 3. I was on the river and I came in at idle. During the time I got on it at wot it was going around 60 mph and then fell on its face like the engine wanted to stall out. That's why I pulled the plugs and found those two like that. It also wouldn't go above 65 mph. Thanks!

  4. #4
    I also notice there is oil residue in the hull and I am running 40:1 premixed.

  5. #5
    powerstroke specialist mikegp's Avatar
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    ok so according to you 1 and 2 are wet and 3 dry right?
    I still suspecting you have bad rear seals.

  6. #6
    2 and 3 were wet, I just rebuilt the motor Last year about 40 hr ago. Is there any way to test for that?

  7. #7
    YudLuz2's Avatar
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    Your plugs are not rich. Did you rebuild your carbs and clean your fuel filters? If not you probably have already leaned seized the motor if it shut off on you. Bogging is a lean condition on top end. The dryer plug is the carb or cylinder you should be worried about. Crank seals don't fail and that dont cause your motor to run like that. The only issue you will ever have with one is when there not correctly installed.

  8. #8
    powerstroke specialist mikegp's Avatar
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    Quote Originally Posted by YudLuz2 View Post
    Crank seals don't fail and that dont cause your motor to run like that. The only issue you will ever have with one is when there not correctly installed.
    SERIOUSLY? listen for what he just said , 1 and 2 were wet. so that means #3 was lean right? how can you explain the oil residue on the bottom if he is premixing?
    I can only think of rear seals.
    you right about one thing, he probably already melt #3
    Last edited by mikegp; 08-09-2013 at 07:27 AM.

  9. #9
    YudLuz2's Avatar
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    If I understand him correctly 2 and 3 are wet and number 1 is lean. The only way for him to be loosing oil through a rear seal is a big hole. There two rear seals on the motor and it would take a lot for them to leak. In 22 years of service and dealing with 60 plus Gpr motors I never had any type of rear seal failure. Oil in hull could be coming from anywhere. He could have a power valve issue, carb problem or fuel flap in the fuel tank just to name a few problems. We really need more information on the history of the ski to know for sure.

  10. #10

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    If anything, I would not expect oil to leak out, but for air to be sucked in.

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