Mercury 40 Service Manual page 29

DRAINING GEAR CASE
1. Place outboard in a vertical operating position.
2. Place a drain pan below outboard.
3. Remove vent plugs and fill/drain plug and drain lubricant.
a -
GEAR CASE LUBRICANT CAPACITY
Gear case lubricant capacity is approximately 22.5 fl oz (655 ml).
CHECKING LUBRICANT LEVEL AND FILLING GEAR CASE
1. Place outboard in a vertical operating position.
2. Remove the front vent plug and rear vent plug.
3. Place lubricant tube into the fill hole and add lubricant until it appears at the front vent
hole. At this time install the front vent plug and sealing washer.
4. Continue adding lubricant until it appears at the rear vent hole.
5. Stop adding lubricant. Install the rear vent plug and sealing washer before removing
lubricant tube.
6. Remove lubricant tube and reinstall cleaned fill/drain plug and sealing washer.
a -
b -
c -
d -
e -
90-828631R3 MARCH 1999
Vent Plugs and Fill/Drain Plug
c
Front Vent Plug
Rear Vent Plug
Front Vent Hole
Rear Vent Hole
Fill/Drain Plug and Sealing Washer
a
d
a
MAINTENANCE
b
e
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