1971 Johnson 4HP Outboard Motors Service Repair Manual P/N JM-7102, Page 48Get this manual

1971 Johnson 4HP Outboard Motors Service Repair Manual P/N JM-7102, Page 48

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GEARCASE HEAD RIVET",OILGASET HOLE
Inspect impeller for wear deteriorationCheck impeHer pin driveshaftInspect impeller housing plate for seoring which reduces water output
PROPELLER SHAFT