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    Evinrude 25 Lean sneeze

    Update: rebuilt the motor w/ new seals and pistons w/ new rings and now it runs like new.
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    Evinrude 25 Lean sneeze

    i was thinking take the block to a machine shop to bore the cylinders 0.030" oversize and get new oversized pistons.
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    Evinrude 25 Lean sneeze

    Pistons
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    Evinrude 25 Lean sneeze

    alright they just looked discolored compared to yamaha con rods and caps that ive seen. And yes they look scored to me sorry shouldve described it that way first. I will get some pictures of the pistons as well. thanks
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    Evinrude 25 Lean sneeze

    through the intake and exhaust ports it looks like there is some adhesive wear on the skirts.
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    Evinrude 25 Lean sneeze

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    Evinrude 25 Lean sneeze

    i now have the crankcase apart. the connecting rods and caps are discolored, are they supposed to be like that or was it overheating or run without oil?
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    Evinrude 25 Lean sneeze

    the seal had the spring out of the lip. could have been the issue but im going to re do all the seals to be safe.
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    Evinrude 25 Lean sneeze

    yes. i just pulled the powerhead and im going to just replace all the gaskets, seals and recirculation lines.
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    Evinrude 25 Lean sneeze

    That makes sense, ive also noticed some feul/ oil in the cowling by the carb, but assumed it was from the carb, that could be from the crankcase seal? And after i adjust it when i start it it runs fine, just next time i take it out again itll need more adjustment. also sometimes it runs fine on...
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    Evinrude 25 Lean sneeze

    yeah its not i mix it in the tank
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    Evinrude 25 Lean sneeze

    i run 50:1 or richer if im going to be full throttle a lot
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    Evinrude 25 Lean sneeze

    Thank you for such a detailed response. unfortunately mine is a single carb, but i will look at completely disconnecting everything and sync the motor from scratch as you said. thanks again
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    Evinrude 25 Lean sneeze

    i will run the motor and post a video as soon as i can. and i agree this should be an easy fix. ive done a bunch of these 31.8 blocks and never had one that was this difficult. Thank you
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    Johnson evinrude drain plug washer

    You can buy packs of 50 on marineengine.com i believe its 70 bucks.
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    Evinrude 25 Lean sneeze

    Would that also be causing excessive smoke? If i do the lower crank seal would you recommend doing anything else while i have the powerhead off and apart? Thank you!
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    Evinrude 25 Lean sneeze

    this model has the primer system and no choke plate in the carb. ive worked on many 31.8 OMC blocks and never had one this difficult to figure out. And sometimes itll sneeze to the point that it dies. Ive also noticed excessive smoke compared to the other motors but i assume they all smoke a...
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    Evinrude 25 Lean sneeze

    Sorry my last post was supposed to be a reply to you
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    Evinrude 25 Lean sneeze

    It is sneezing in neutral and in gear. I also hear a slight knocking noise around 1000 rpm. There is no hesitation when i give it throttle. and i have it set so the cam follower pickup point is between the two marks like the service manual states. So yeah the timing does advance a little...
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    Evinrude 25 Lean sneeze

    Are you talking about the throttle control rod? And I dont have the motor with me but i will do that again, when i rebuilt the carb the needle was very pointy as is should be. Thank you
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