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  1. R

    Fuel in crankcase oil.

    Is it possible to have a ruptured fuel pump diaphram but a dry sight tube? My engine oil smells of gas and looks like its thin. The sight tube is dry as a bone but has crud in the fuel pump inlet. Possible clog? I cleaned the crud out but he tube is still dry. Could a stuck carb float cause that...
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    Blow-by and compression numbers?

    I noticed oil spurting out of my crankcase vent and into my flame arrestor. Enough of it that it became a slow drip. I Did a compression test and the numbers seem ok #1 140 #2 140 #3 135 #4 150. I did the compression test cold as per mercruiser service bulletin 97-25. My question is why are most...
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    Mercruiser 3.0 stalls after 30 min

    1989 merc 3.0 starts fine, runs fine for about half an hour at any speed or rpm then starts to miss and will eventually stall. Fuel dripping from flame arrestor but only once rough running starts. Will sometimes restart after a few minutes and run ok other times will continue to run rough and...
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