Gearcase Lubricant - Mercury 300 XS OptiMax Manual

Gearcase Lubricant

CHECKING/REFILLING GEARCASE LUBRICANT
c
a - Sport Master gearcase (vertical operating position)
b - Fleet Master/Torque Master gearcase (vertical operating position)
c - Vent hole
d - Vent plug and sealing washer
e - Fill/drain hole
f - Fill/drain plug
Tube Ref
No.
1. Place the outboard in a vertical operating position.
2. Remove the vent plug (upper plug) and sealing washer.
3. Remove the fill/drain plug (lower plug).
4. Quickly place lubricant tube into the fill hole.
5. Slowly add lubricant until it flows from the (upper) vent hole.
6. Stop adding lubricant. Install the (upper) vent plug and sealing washer
before removing the lubricant tube.
IMPORTANT: Replace sealing washers if damaged.
NOTE: Examine the magnetic fill/drain plug for metal particles. A small amount
of metal filings or fine metal particles indicates normal gear wear. An
excessive amount of metal filings or larger particles (chips) should be checked
by an authorized dealer.
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MAINTENANCE
a
f
Description
SAE 85W90 Mercury
Racing Gear Oil
d c
e
Where Used
Gearcase
89
b
or49-1
Part No.
8M0078015
d