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Mercury 40 Service Manual

Mercury 40
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NON-BIGFOOT GEAR HOUSING
Page 6A-5190-828631R3 MARCH 1999
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 Quicksilver 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. Let gearcase sit for at least one minute
to allow lube to settle out, then top off.
5. Replace this “Vent” plug and gasket.
6. Install “Fill” plug and gasket.
a
a-“Vent” Plug
7. Torque “Fill” and “Vent” screws to 55 lb-in. (6.2 Nm).

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Mercury 40 Specifications

General IconGeneral
Horsepower40 hp
Starting SystemElectric
SteeringRemote
Fuel Induction SystemEFI (Electronic Fuel Injection)
Shaft Length20"
Full Throttle RPM Range6000

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