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    '80 115 Merc Comp. 135 and noisy on 1,2,4,5,&6, 60 on #3 spins quieter and

    Great forum! My engine lost power and sounds like it's got a rod knock. All spark plugs look similar - oily - maybe milky :~( When checking compression with all plugs out (I didn't open the throttle) the engine spins quickly and pretty noisily. All cylinders except #3 read 135 to 140. When...
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