by TIM
(Pensacola)
just bought this 2010, merc 50, was running great on plane, then it started making a fast "whooping, knocking " kinda noise...thought I caught a root. Boat slowed down, wouldn't plane out at all. Compression is good.Drained tank before. Ran watermuffs b4 and fell off. Alarm came on. All b4 problems. Comp is 110.
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