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  1. offshore79

    3.0 engine stalling out after 20 minutes.

    I have yet another gremlin in the machine. 1989 OMC (GM) 3.0L 20 ft Baja bowrider. I bought the boat at an auction in the spring and have been trying to get it right ever sense. Rebuilt engine (thats a long story that took 1-1/2 months), rebuilt carb, new points, condenser, coil, plugs, wires...
  2. offshore79

    My pet gremlin moved on my 1989 OMC 3.0. Need help with cooling sytem.

    Re: My pet gremlin moved on my 1989 OMC 3.0. Need help with cooling sytem. That didnt do it. When I take the hose off the thermostat housing I get water to flow, when I put it back on, the hot side overcomes the cold side. Does anyone know why this would be? Could there be a leak somewhere...
  3. offshore79

    My pet gremlin moved on my 1989 OMC 3.0. Need help with cooling sytem.

    1989, 20 ft baja, omc (GM) 3.0l, cobra drive. Ok, so now I have a new problem that I cant seem to get figured out. I finally got my engine to run great, however, I had to shut it down after few minutes due to it getting to overheat temp. At the dock I dropped the lower unit and was mentally...
  4. offshore79

    Quick question for 1989 OMC 3.0L with trouble running

    Again, 1989 OMC 3.0 in a 20 ft Baja open bow, fresh rebuild that I had running finally for a short time. Ive replaced coil, points, condenser, wires, plugs, rebuilt carb, good fuel supply and pressure, adjusted valve lash, I'm trying to time it to 1* BTDC but having trouble because of the...
  5. offshore79

    Substitute main bearings - OMC 3.0L

    After thumbing through all may OMC, Chilton, Mercruiser and even Fiero repair manuals, I found a suitable replacement for the standard main bearings on a 1980's OMC 3.0L. What I found was that the 1980 Pontiac Sunbird, starfire, skyhawk and monza all have a 2.2988 Ave. crankshaft journal. I...
  6. offshore79

    1989 OMC 3.0 runs ok but dies after a few minutes

    Hi all, It's my first post. I've been reading alot of posts of similar issues and then some and I still dont have a solution to my problem. What I have and what I've done. I bought a fixer upper 19 baja with a bad OMC 3.0 engine. The head was cracked and the cylinders were rusted. The inside of...
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