1973 Johnson 2HP Outboard Motor Model 2R73 Service Repair Manual JM-7301, Page 42Get this manual
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WATER PUMP SCREWS
DNOTE Driveshaft bushing in gearcase is not servicedIf worn, replace gearcaseCLEANING,
INSPEClON
AND REPAIR
Wash parts in clean solvent such as Solvaso