Reply To: ’77 OMC 9.9hp hard start warm

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June 7, 2021 at 4:11 pm #239660
jerryswiss
Participant

    Ok, this is what I have learned. I got it to run in a tank and can start it consistently when warm. It has spark when warm, and will start, but has a somewhat inconsistent idle and is somewhat hard to start. If you pump the primer bulb on the fuel line it makes it start easier and idle smoother. Carb is clean, fuel pump rebuilt, tank vent is ok. I think there is an air leak somewhere.

    What do you think? Where would the common place for an air leak be?