Lubrication - Mercury 540 Bravo Manual

8. Continue adding gear lube until the oil level is at the top line marked
"COLD FILL" on the bottle.
9. Lubricate the neck of the O‑ring with Mercury Racing Gear Oil to ensure
ease of installation and removal of the cap.
10. Install the filler cap, being careful to not overtighten.
IMPORTANT: Check the reservoir bottle oil level after the first use.
11. Heavily grease the propeller shaft with Extreme Grease. Reinstall the
propeller and tighten the nut to the specified torque.
Tube Ref
No.
Description
Propeller nut
IMPORTANT: The oil level in the gear lube monitor will rise and fall during drive
operation. Always check the oil level when the drive is cool and the engine is
shut down.

Lubrication

DRIVE UNIT AND TRANSOM ASSEMBLY
IMPORTANT: Disconnect the speedometer hose fitting from the driveshaft
housing prior to removing the sterndrive unit to prevent damage to the fitting.
IMPORTANT: The sterndrive must be removed in order to lubricate the
U‑joints. Contact your authorized Mercury MerCruiser dealer for this service.
NOTE: The engine coupling and shaft splines are greased with engine coupler
spline grease. Universal joints are greased with 2‑4‑C with PTFE lubricant.
eng
MAINTENANCE
Description
SAE 85W-90
Mercury Racing
Gear Oil
Extreme Grease
Where Used
Neck of the O-ring on the gear lube
monitor bottle
Propeller shaft splines
Nm
75
63
7990
Part No.
8M0078015
8M0071842
lb‑in.
–
lb‑ft
55