Sterndrive Gear Lube; Checking; Filling; Changing - Mercury 350 MAG Manual

Section 5 - Maintenance

Sterndrive Gear Lube

Checking

Discharge of oil, coolant, or other engine/drive fluids into the environment is restricted by law. Use caution not to spill oil, coolant,
or other fluids into the environment when using or servicing your boat. Be aware of the local restrictions governing the disposal
or recycling of waste, and contain and dispose of fluids as required.
NOTE: The oil level fluctuates during operation, so check with the engine cold before starting.
1. Check the gear lube oi level. Keep the oil level within the recommended operating range.
2. Inspect the lubricant condition. If any water is visible at the bottom of the gear lube monitor, if water appears at the fill and
drain plug hole, or if the gear lube appears discolored, contact your authorized Mercury MerCruiser dealer immediately. These
conditions can indicate a water leak in the sterndrive.

Filling

New installations may require as much as 470 mL (16 fl oz) of gear lube added to the monitor bottle during the break‑in period
(20 hours of running time). It is important to monitor and maintain the gear lube level during the break‑in period.
IMPORTANT: The gear lube monitor must be checked and filled if necessary at the beginning of each day when the engine is
cold. If the gear lube alarm sounds during the day's activity, add the appropriate amount of gear lube to the monitor bottle.
NOTE: If filling the entire sterndrive, see Changing .
1. Remove the gear lube monitor cap.
2. Fill the monitor with the specified fluid until the gear lube level is in the operating range. Do not overfill.
Tube Ref No.
High Performance Gear
87
Lubricant
3. Replace the cap.

Changing

1. Remove the gear lube monitor from the bracket.
2. Empty the contents into a suitable container.
3. Install the gear lube monitor in the bracket.
4. Bravo One Models:
a. Remove the propeller.
b. Position the sterndrive unit to the full down position.
c. Remove the oil fill and drain screw and sealing washer.
Page 90
Gear lube monitor
Description
NOTICE
43200
Where Used
Gear lube monitor
Part No.
92-858064K01
90-8M0050539 MAY 2011
eng