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  1. 7

    1997 SeaDoo GTX plug read

    In the pic below, left plug is mag cylinder, right plug is pto. Does right plug indicate rich? If so, what is the adjustment? Thanks for the input!
  2. 7

    still chasing high idle condition

    1979 Mercruiser 2.5L 120HP, Delco distributor. After WOT run, engine will not idle down. I have verified that the idle screw returns to to the cam stop. After engine is shut off and restarted, it idles at 700 rpm w/ 8 deg. of timing. Has to be timing advance right? Advance weights are free and...
  3. 7

    fast idle after run

    MCM120, MC1 drive. When started boat idles at approx. 600-700 rpm. After WOT runs, in neutral, boat idles high at approx 1200 rpm. If I kill engine and restart, it again idles at 600-700 rpm. I think the idle screw on carb is adjusted correctly, and the mechanical advance in the dist. is...
  4. 7

    MCM 120 high idle rpm after running

    After WOT runs when the control is put back into neutral, the engine idles high (1500-1700 rpm). W/O touching the control or anything else if I turn off and restart the engine, it idles fine at 500-700 rpm. When the engine is in the high idle condition, I have verified that the idle stop screw...
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