Mercury 40 Operator's Manual page 68

DRAINING GEARCASE
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 - Vent plugs
GEARCASE LUBRICANT CAPACITY
Gearcase lubricant capacity is approximately 710 ml (24 fl. oz.).
CHECKING LUBRICANT LEVEL AND FILLING GEARCASE
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 - Front vent plug
b - Front vent hole
c - Rear vent hole
MAINTENANCE
b -
c
b
a
d -
e -
62
a
b
ob00441
Fill/drain plug
Rear vent plug
Fill/drain plug and sealing washer
d
e
ob00442