1971 Johnson 4HP Outboard Motors Service Repair Manual P/N JM-7102, Page 46Get this manual

1971 Johnson 4HP Outboard Motors Service Repair Manual P/N JM-7102, Page 46

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DESCRIPTION EXHAUST RELIEF Normally, exhaust gases conducted down through the exhaust housing and out the underwater outlet in the gea rca seThe siphoning action of the ll and water provides an unrest