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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.

    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...
  3. 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...
  4. 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...
  5. 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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