Mercury Racing 500R Operation And Maintenance Manual page 139

GEARCASE LUBRICANT CAPACITY
NOTE: The specified gear lubricant quantity will put the lubricant level at the
bottom of the lubricant level plug hole when full.
R‑Drive Sport
R‑Drive
DRAINING AND FILLING THE GEARCASE
Draining Gearcase
1. Place the outboard in a vertical operating position.
2. Remove the propeller. Refer to Propeller Replacement.
3. Place a pan below the gear housing to capture the lubricant.
4. Remove the lubricant level plug and fill/drain plug. Allow a sufficient
amount of time for the gearcase to drain. Depending on the ambient air
temperature, it may take 30 minutes for the gearcase to completely drain.
Filling the Gearcase
1. After the gearcase has been drained, fill the gearcase through the fill/drain
hole.
2. Add the specified gear lubricant.
IMPORTANT: Replace the sealing washers if damaged.
3. Allow a few minutes for the lubricant level to stabilize in the gearcase
before installing the lubricant level plug. Install the lubricant level plug.
eng
MAINTENANCE
Gearcase Lubricant Capacity
Right‑hand rotation
Left‑hand rotation
Right‑hand rotation
Left‑hand rotation
a
b
76771
129
940 mL (31.8 fl oz)
940 mL (31.8 fl oz)
940 mL (31.8 fl oz)
940 mL (31.8 fl oz)
a - Lubricant level plug
b - Fill/drain plug