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    omc 3.0 rpm's

    I have a 1986 omc 3.0l, the tech manual says may rpm's are 4500-5000 rpms. When at w.o.t. on a smooth lake (lake mead), with no wind, my boat hits about 2200 rpm's about 33-35 mph . Now here is my question, my tach even though very old seems to work ok, I timed the engine with the 600rpm mark...
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    engine just quits, why???

    I have a 1986 omc 3.0l, when at either 3/4 throttle to w.o.t, at any given time the engine will just quit, almost as if I turned the ignition off. It's very quick and once in a while it will do it when I'm at w.o.t and I pull back on the throttle (and we are talking fairly slow just to 3/4...
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    a little timing help please...

    This question may sound dumb but I'm a novice at timing engines, on a omc 3.0l motor 1986...<br />1. when using a timing light at idle which tooth or dip do I use to time my engine, ya know the timing gauge looks kinda like sharks teeth, do I use the pointy side and if so which one, or do I use...
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    How to adjust valve lash?

    I have a 1986 3.0Liter 4 cylinder OMC.<br /><br />My question is this, <br />I am rebuilding the top end of my motor, it was running perfectly except for a very minor gasket leak, My head was professionally rebuilt and I am putting the top end back together. Here is my question, I am about to...
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