1978 Johnson 55 HP Outboards Service Repair Manual P/N 506997, Page 58Get this manual

1978 Johnson 55 HP Outboards Service Repair Manual P/N 506997, Page 58

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OEseR IPTION The power head consists of the cylinders, pistons, rods, crankshaft, and crankcaseThe power head has two horizontally mounted cylindersAlternate firing order is used so that each cylinder