1971 Johnson 4HP Outboard Motors Service Repair Manual P/N JM-7102, Page 37Get this manual

1971 Johnson 4HP Outboard Motors Service Repair Manual P/N JM-7102, Page 37

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Since the pistons, with the piston rings, receiv te force of combustion in the cylinder head, 1t 1S necessary that both the ists ist ig.s properly fitted to form seal between the p1ston head and cylin

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