Checking; Filling; Changing - Mercury 350 MAG Manual

Section 5 - Maintenance

Checking

IMPORTANT: The gear lube level fluctuates during operation. Check before starting, when the engine is cold.
1. Check the gear lube level in the monitor bottle. Keep the gear lube level within the recommended operating range.
2. Inspect the gear lube condition. If any water is visible in the bottom of the gear lube monitor, if water appears at the fill and
drain plug hole, or if the gear lube appears discolored, these conditions can indicate a water leak in the sterndrive.

Filling

IMPORTANT: If more than 59 ml (2 fl. oz.) of gear lubricant is required to fill the monitor, a seal may be leaking. Damage to the
sterndrive unit may occur due to lack of lubrication. Contact your authorized Mercury MerCruiser dealer.
1. Remove the gear lube monitor cap.
2. Fill the monitor with the specified fluid so that the gear lube level is in the operating range. Do not overfill.
a
Tube Ref No.
High Performance Gear
87
Lubricant
3. Ensure that the rubber gasket is inside the cap and install. Do not over tighten.
NOTE: When filling the entire sterndrive unit refer to Changing .

Changing

1. Remove the gear lube monitor from the bracket.
2. Remove the gear lube monitor cap and empty the contents into a suitable container.
3. Install the gear lube monitor in the bracket.
Page 88
a
b
Description
a -
b -
b
43458
a - "ADD" mark
b - "OPERATING RANGE" mark
19948
Where Used
Gear lube monitor
Seawater cooled models
Closed cooled models
Part No.
92-858064K01
90-8M0050539
eng
MAY 2011