Drive Unit Oil; Checking; Filling - MerCruiser 350 MAG Owner's Manual

Section 5 - Maintenance

Drive Unit Oil

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.

Checking

NOTE: Oil level will fluctuate during operation. Oil level should be checked with the engine
cold, before starting.
1. Check the gear lube oil level. Keep the oil level within the recommended operating
range. If any water is visible at the bottom of the monitor or appears at the oil fill/drain
plug and/or if oil appears discolored, contact your authorized Mercury MerCruiser
dealer immediately. Both conditions may indicate a water leak somewhere in the
sterndrive unit.
Seawater cooled models

Filling

IMPORTANT: If more than 59 mL (2 fl oz) of High Performance 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 oil level is in the operating range. Do
not overfill.
Tube Ref No.
3. Replace the cap.
NOTE: When filling the entire sterndrive unit refer to Changing.
Page 66
a
6107
a - Gear lube monitor
Description
High Performance Gear
87
Lubricant
NOTICE
Closed cooled models
Where Used
Gear lube monitor
90-864195072 OCTOBER 2007
a
6105
Part No.
92-858064K01