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Mercury 40 FourStroke - Page 466

Mercury 40 FourStroke
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NON-BIGFOOT GEAR HOUSING
Page 6A-50 90-857046R1 NOVEMBER 2001
Filling Gear Housing with Lubricant
NOTE: Gear housing lubricant capacity is approximately 14.9 fl oz (440 ml).
WARNING
If gear housing is installed on outboard, disconnect (and isolate) spark plug leads
from spark plugs before working near the propeller.
CAUTION
Do not use automotive grease in the gear housing. Use only Premium Gear Lube.
1. Remove any gasket material from “Fill” and “Vent” plugs and gear housing. Install new
gaskets on “Fill” and “Vent” plugs.
IMPORTANT: Never add lubricant without removing “Vent” plug. Gear housing can-
not be filled because of trapped air. Fill gear housing when driveshaft is in a vertical
position.
2. Remove “Fill” plug and gasket.
3. Insert lubricant tube in “Fill” hole, then remove “Vent” plug and gasket.
4. Fill until excess lubricant flows out of “Vent” hole.
5. Replace this “Vent” plug and gasket.
6. Install “Fill” plug and gasket.
a
a-“Vent” Plug
7. Tighten “Fill” and “Vent” screws to specified torque.
Fill and Vent Screw Torque
55 lb. in. (6.0 N·m)

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