Checking; Filling - Mercury 2.8 Diesel Operation & Maintenance Manual

Section 4 - Maintenance

Checking

NOTE: The gear lube level will fluctuate during operation. The gear lube level should be checked with the engine cold, before
starting.
1. Check the gear lube monitor to determine the gear lube level. Keep the gear lube level within the recommended operating
range. Refer to Filling.
a
IMPORTANT: If any water is visible at the bottom of the gear lube monitor or appears at the fill and drain plug hole, or if the
gear lube appears discolored, contact your Mercury Diesel authorized repair facility immediately. Both conditions may
indicate a water leak in the sterndrive.

Filling

IMPORTANT: If more than 59 ml (2 fl. oz.) of High Performance Gear Lube is required to fill the gear lube monitor, a seal may
be leaking. Damage to the sterndrive may occur due to lack of lubrication. Contact your Mercury Diesel authorized repair
facility.
1. If the gear lube level is below or near the "ADD" mark, the specified gear lube must be added.
2. Remove the gear lube monitor cap.
3. Fill the gear lube monitor with the specified gear lube so that the gear lube level is in the operating range. Do not overfill.
c
a
Tube Ref No.
High Performance Gear Lube
87
4. Ensure that the rubber gasket is inside the gear lube monitor cap and install the cap. Do not overtighten.
a
NOTE: When filling the entire sterndrive, Refer to Changing .
Page 44
b
b
Description
a - Gear lube monitor cap
19962
Gear lube level shown is at the correct operating range
a - "ADD" mark
b - "OPERATING RANGE" mark
19948
Gear lube monitor
a - Gear lube level at the "ADD" mark
b - Gear lube level at the "OPERATING RANGE" mark
c - Gear lube monitor cap
19947
Where Used
Gear lube monitor
90-8M0113987
Part No.
92-858064K01
DECEMBER 2015
eng