Mercury MERCRUISER - Sterndrive U-Joint Shaft Splines and O-Rings (Sterndrive Unit Removed); Engine Coupler

Section 5 - Maintenance
90-899883295 JUNE 2008 Page 97
Sterndrive U‑joint Shaft Splines And O‑rings (Sterndrive Unit Removed)
1. Coat sterndrive U‑joint O‑rings and driveshaft splines with grease.
b
a
8591
a - Driveshaft splines b - U‑joint O‑rings (3)
Tube Ref No. Description Where Used Part No.
91
Engine Coupler Spline Grease
Driveshaft splines and U-joint
O-rings
92-802869A 1
2. For propeller shaft lubrication, refer to Propellers.
Engine Coupler
1. Lubricate engine coupler splines through the grease fittings on the 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
a
a
14535
Bravo drive coupler
a - Grease fitting
Tube Ref No. Description Where Used Part No.
91
Engine Coupler Spline Grease Coupler 92-802869A 1
NOTE: On Bravo models, the coupler and shaft splines can be lubricated without removing
the sterndrive. Apply lubricant from a typical hand‑operated grease gun until a small
amount of grease begins to push out.