1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 29Get this manual

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PRE- IGN ITION and DETONATION PRE-I GN ITI ON Preignition abnorma fuel ignitioncau' by co mbustion cha mber hol spotsControl of the tart of ignj tio is lost, a: combustion pr ure ri too arJ ', cau in

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