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    Korky in MN - Mercruiser miss

    1986 (approx) Four Winns Mercruiser MCM 140 #A676736 (from engine placard), 4 cylinder 3.0L (assumed) PROBLEM After cruising for a short time, the engine develops a “hardmiss” which is persistent once the engine is hot. The tach confirms RPMfluctuation. Must throttle back and can only idle...
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