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    Mercruiser 3.0 "Mystery" - should I be worried ???

    OK - here it goes... 1998 Mercruiser 3.0, Mercarb and Delco ignition. Starts great cold or hot. Idles good. Reaches WOT on the water without backfiring or hesitation ( about 4600 RPM). Overall, runs GREAT (knocking on wood). Carb rebuilt (soak overnight, every orifice gone through). Did...
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    Help!!! Mercruiser Engine year identification.

    Last year, bought a used Mercruiser 3.0 (140) and had it installed. Always been curious what year it was made. I located the engine serial number, M339757 (tag near the starter) and have looked UP AND DOWN, and at every link which I could find, but have not been able to find out year of manuf...
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