Drive Unit Oil; Checking; Filling; Section 5 - Maintenance - MerCruiser 4.3L TKS Sterndrive 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
a - Gear lube monitor

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.
High Performance Gear
87
Lubricant
3. Replace the cap.
NOTE: When filling the entire sterndrive unit refer to Changing.
Page 50
a
6107
Description
NOTICE
Closed cooled models
Where Used
Gear lube monitor
a
6105
Part No.
92-858064K01
90-8M0053265 NOVEMBER 2010