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    Thunderbolt IV problem:distributor sensor or module?

    1st time out 87 Wellcraft with 5.7 260hp Mercruiser and Alpha 1. TB IV ignition. Ran well until ignition breaker popped. Got towed in by Ranger... Found temp gauge had shorted out and it was attached to a purple wire off of key and it also runs to + on coil. With gauge bypassed no more...
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    87 Alpha1: What rocks the interrupter switch?

    1987 Mercruiser Alpha 1 on a 5.7 260hp. Recent purchase ans previous ower worked on it :( PROBLEM: Hard to get into neutral. The interrupter switch does work (manually) but is not being activated. I can't figure out what should roll the cams?? Any advice appreciated!
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    4.3 omc knocking/casn I get a chevy v6?

    My 91 Four Winns I/O motor seems to be knocking. I am sure it is bad. It looks like a chevy v6 and has an Edlebrock intake and carb. I was told that that boat motors rotate in reverse? I wanted to get a decent 4.3 v6 from a junkyard truck. Is this an option?
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    My trim guage is not working? OMC 4.3

    I have a 1990 Four Winn with the I/O 4.3 Chevy v6 and OMC drive. When my key is on the trim guage pegs all the way up and never moves when I trim up or down. The ground seems good. I have tried to trace the single wire that goes back. Anyone know where it hooks up to the OMC and how does it...
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    Can't find the right plug wires for my 1990 OMC 4.3?

    I have a 1990 Four Winns with a Chevy 4.3 and an OMC Cobra. It is carbed with points. I can not seem to find plug wires that work? The biggest problem is none of the wires have a 90 angle at the distributor. Anyone know what year v6 plug wires will work? (Spent 30 minutes at Autozone with...
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