Procedure
Gearcase Oil Fill
1. Insert the oil tube nozzle into the lower oil plug hole. 2. Fill with gear oil by squeezing the oil tube until oil flows out of the upper plug hole. 3. Replace the oil plug gasket with a new one. 4. Install the upper oil plug first, then remove the oil tube nozzle and install the lower oil plug. Parts: Oil plug gasket (new), Mercury or Quicksilver Gear Oil (API GL-5, SAE #80 to #90)