Sterndrive U-Joint Shaft Splines And O-Rings (Sterndrive Unit Removed); Engine Coupler - MerCruiser Sterndrive 4.3 MPI User Manual

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 Bravo Models ‑ every 50
hours; Alpha Models ‑ every 150 hours.
a
Alpha drive coupler
a - Grease fitting
Tube Ref No.
Engine Coupler Spline
91
Grease
NOTE: Alpha Models ‑ Your power package is equipped with a sealed engine coupler and Perm‑a‑Lube U‑joints. The sealed
coupler and shaft splines can be lubricated without removing the sterndrive unit. The Perm‑a‑Lube U‑joints do not require
lubrication.
NOTE: Bravo Models ‑ 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. The Perm‑a‑Lube U‑joints do not require
lubrication.
90-8M0053269 NOVEMBER 2010
b
a
Description
6213
Description
a - Driveshaft splines
b - U‑joint O‑rings (3)
8591
Where Used
Driveshaft splines and U-joint O-rings
a
6212
Bravo drive coupler
Where Used
Coupler
Section 5 - Maintenance
Part No.
92-802869A 1
Part No.
92-802869A 1
Page 73