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    OMC 5.8 Carburetor to manifold question

    Good morning, I have a question regarding the mounting of the carburetor and spacer to the intake manifold. I am going to try to upload some pictures to help explain. I have a 1990 OMC 5.8L and the intake manifold has the 4 round hoels and then the oval shaped hole off to the side. (manifold 5...
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    Slow cranking 1990 OMC 5.8

    Good morning all: I have a 1990 OMC 5.8 in a Caravelle I 2300. Last year found out the block was cracked found a bare block and rebuilt the engine. Got it started on the test stand for a little break in period and now have it installed in the boat. The engine will not start. It turns over very...
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    OMC 5.8 Cobra with water in the oil

    OK, this boat is not going to get the best of me. I bought a 1991 23' Caravelle with a 351W 5.8 Cobra. The top end of the engine came in a box. The heads, intake, carb exhaust manifolds etc. The short block was still in the boat covered with a tarp for about 4 years. The Port side exhaust...
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    1990 5.8 distributor question

    Good morning, I have a 1990 OMC 5.8 Cobra and I can not get the thing to run right. I replaced the spark plugs, wires, distributor cap and points. My question is - I turned the engine to TDC and saw were the rotor is pointed, started running the wires in sequence according to the manual. I...
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    Starter Help

    Good afternoon, I have a 1991 Caravelle Interceptor with a 351 OMC Cobra 5.8L. The starter began chewing up the ring gear on the flywheel so I bought a new starter and ring gear. While doing some research the old style 9 tooth CW starter seems to be obsolete, so I bought one that states it will...
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    3.0 Mercruiser WOT troubles

    Hello All: Just bought our first boat (1987 - 19 Open Bow Glass Sport with a 3.0 and Alpha one) and have been addicted to these forums now because of the issues with the boat not running right from day one. We take her out and she started right up, idled fine after warming up and took off. We...
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