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  1. M

    Distributor Test

    Hi, '89 OMC Cobra 4.3. Is there an easy way to test a distributor? In the Clymer manual, it states to grasp the rotor, twist it clockwise (GM engines), release it and it will return to its previous position. If it doesn't, then there is a problem with the advance mechanism, and requires...
  2. M

    Won't Start, Timing Issue

    '88 4.3l OMC Cobra I'm feeling a bit dumb. Had my boat out the other day, started and ran to 1800 RPM and then would backfire. I figured timing and didn't run the boat much when I noticed I was still getting water in my gear oil. Not a ton of water so I drained the gear oil, replaced it and...
  3. M

    new engine oil pressure

    1988 4.3l OMC Cobra Another issue with this lovely boat, I had a guy install a reman. engine a couple months back and haven't had a chance to break it in yet as I've had other issues which now are resolved. Thanks. The oil pressure is reading around 50 psi at idle and quickly jumps to 70 - 80...
  4. M

    Retaining Screw OMC Cobra

    1988 4.3l OMC Cobra I'm curious about a "retaining screw" near the water entrance on the starbird side of the lower unit. What does this screw hold? I was going to replace the washer on it but was too scared to take it out. (Thinking maybe it was another mystery screw like the one on the...
  5. M

    Water Pump Adapter Removal

    Hi guys, 1988 4.3l OMC Cobra. I'm trying to replace the water pump shaft seal, o-rings and gasket behind the water pump adapter. The manual says use vice-grips and pull the sucker out. Problem is, darn thing won't budge at all! Any ideas? I was thinking dousing the thing with PB Blaster and...
  6. M

    OMC Cobra Manual online/download

    I've noticed a lot of links for Mercruiser manual downloads. Anyone know where I can download one for a 1988 OMC 4.3 Cobra?? Thanks
  7. M

    Water in gear oil

    1988 OMC Cobra 4.3l. Recently pulled the sterndrive to replace the mystery screw on the port side of the outdrive which was never there when I bought the boat. Previously had no water in the gear oil when running for extended periods. Re-installed the sterndrive, started it up had water...
  8. M

    OMC Cobra outdrive, the mystery screw

    Hi, I'm new to the boating scene and bought my first boat earlier this year. 1988 4.3l Chevy OMC Cobra outdrive. Replaced motor, new manifolds/risers (yeah, i'm new, bought a busted boat) Today I learned about the mystery screw on the port side of the outdrive (i thought thats where water was...
  9. M

    OMC Exhaust Manifold crack/repair

    I have an 88 OMC Cobra, V6 engine. Just replaced the engine do to bad winterization from previous owner. My question is with the one-piece manifolds that were cracked visibly on the outside. Is it a givin that these also cracked on the inside whereas water will enter into the exhaust? Is...
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