Sterndrive U-Joint Shaft Splines And O-Rings (Sterndrive Unit Removed); Engine Coupler; Driveshaft Extension Models - MerCruiser 496 MAG Owner's Manual

Section 5 - Maintenance
Sterndrive U‑joint Shaft Splines And O‑rings (Sterndrive Unit Removed)
1. Coat sterndrive U‑joint O‑rings and driveshaft splines with grease.
Tube Ref No.
Engine Coupler Spline
91
Grease
2. For propeller shaft lubrication, refer to Propellers.

Engine Coupler

1. Lubricate engine coupler splines through grease fittings on coupler by applying approximately 8‑10 pumps of grease from a
typical hand‑operated grease gun.
NOTE: If the boat is operated at idle for prolonged periods of time, coupler should be lubricated every 50 hours.
Tube Ref No.
Engine Coupler Spline
91
Grease
NOTE: The coupler and shaft splines can be lubricated without removing the sterndrive unit. Apply lubricant from a typical
hand‑operated grease gun until a small amount of grease begins to push out.

Driveshaft Extension Models

1. Lubricate the transom end grease fitting and engine end grease fitting by applying approximately 10 ‑ 12 pumps of grease
from a typical hand‑operated grease gun.
Page 74
b
a
Description
Bravo drive coupler
a - Grease fitting
a
6212
Description
a - Driveshaft splines
b - U‑joint O‑rings (3)
8591
Where Used
Driveshaft splines and U-joint O-rings
Where Used
Coupler
Part No.
92-802869A 1
Part No.
92-802869A 1
90-899883274 MARCH 2008