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  1. M

    1987 4.3l omc won't start after doing tune-up

    i've just did everything i can thing of to my engine this summer,, i changed my coil, plugs, distributor cap, rotor,cond ensor, carb kit and fuel filter, water separator and it would still fire up until i changed the cap,condensor and points now its won't start it almost does, when i hold the...
  2. M

    ignition coil

    i just changed my ignition coil in my 87 OMC 4.3L cobra sterndrive as i have been having issues with engine running rough, i've changed plugs, water/fuel separator, done a carb kit, checked rotor cap, looks in good shape. and was still running rough. than i noticed oil all over the engine, and...
  3. M

    impeller question

    does #of fins on impeller matter, bought new one before opening mine up and mine has 10 fins and is in good shape still, i assume the casing is supposed to be oval(weird i thought but read that ahead of time) the new impeller has 6 fins w/no inner sleeve and my old one doesn't come apart it is...
  4. M

    what to do next, engine still cavitating

    don't know what to try next, engine was running beautiful 3 wks ago then there was oil/black stuff all around the flame arrester, and from then on the engine wouldn't run good, it will start but what i would call a cavitation or maybe starving for gas. so so far i have changed the plugs which...
  5. M

    need help setting slow idle,idle speed and fast idle screws

    i just took my 4bbl rochester carb apart and did a rebuild kit cleaned it all and am about to hook it back on the motor, i never touched the idle speed screw(the one on the side) so hopefully it will be fine, the slow idle screws i put back to where they were, the left one was 2-1/2 turns out...
  6. M

    trying to det my hp

    i have a 1987 edson 19ft , it has an 4.3l omc engine 4V V6 cobra stern drive, i just bought it last year my bill of sale says 170hp but everything i look up is 175hp wonder if the lady just made a typo. tried to find but no definite answer
  7. M

    87 OMC 175HP Cobra Drive hesitation when wide open

    hi first timer in these forums. i have a 87 omc 175hp engine in a 19ft edson boat just bought it, changed , engine oil, bottom end oit, fuel sepparator and belts. cause it was sitting a couple years. it starts and runs great but when i go wide open at about 45mph and 4600-4800rpm it hesitates or...
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