1972 Johnson 4HP Outboard Motor Service Repair Manual P/N JM-7202, Page 15Get this manual

1972 Johnson 4HP Outboard Motor Service Repair Manual P/N JM-7202, Page 15

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DESCRIPTION FUEL FLOW The fuel system consists of fuel tank, fuel pump, and carburetorThe fuel tank is non-pressurized, suction operatedA diaphragm-displacement type fuel pump on the motor draws fuel