2004 SR Johnson 2-stroke 40, 50HP Service Repair Manual P/N 5005640, Page 141Get this manual

2004 SR Johnson 2-stroke 40, 50HP Service Repair Manual P/N 5005640, Page 141

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FUEL SYSTEM OMS PUMP OPERATION

The oil piston (16) pushes oil through the outlet check valve (17), pushes the oil switch actuator piston (18) up, and pushes the oil into the fuel inlet ch