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    1984 OMC 200HP compression

    Hey all. Finally got a chance to run the leakdown test losing a bit of compression to rings but the majority of it is lost to the exhaust valve on that low cylinder. This is likely due to it being on the exhaust stroke over winter as it was never foged. Looks like it'll need a head job. Thanks...
  2. L

    1984 OMC 200HP compression

    Right, got a little ahead of myself and forgot rings existed lol. How do I know if the lose of compression is going out a warn valve or rings though? Wouldn't a leak down test just show compression loss?
  3. L

    1984 OMC 200HP compression

    Unfortunately I don't have the equipment to do a leak down test. I think I'll do as you suggested and just pull the head and take them to a shop to get machined. Would a cracked piston wall still blow 90? I'm assuming not so hopefully it's just a valve or head gasket issue. Thanks a bunch! I'll...
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    1984 OMC 200HP compression

    Motor is a 1984 inbord omc V8 I belive the 305 not sure if it's a 2v or 4v. Seems to start and sound alright other that the compression on the one is way off. I'm going to try tightening the heads tomorrow and maybe get lucky. I also read online de carbing might help. Edit: I should add the...
  5. L

    1984 OMC 200HP compression

    Hey everyone. Just went out and purchased a 1984 edson intruder with known drive issues. Unfortunately I was not able to run the engine as it's the middle of winter here. Just a a video to go off of. My concern is once I got it home and into my garage I discovered it wasn't winterized properly...
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