Sterndrive U-Joint Shaft Splines And O-Rings (Sterndrive Unit Removed); Engine Coupler - MerCruiser 350 MAG Owner's 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.
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.
Alpha drive coupler
Tube Ref No.
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.
90-864195072 OCTOBER 2007
a - Driveshaft splines
Description
Engine Coupler Spline Grease
91
a
a - Grease fitting
Description
Engine Coupler Spline Grease
91
b
a
8591
b - U‑joint O‑rings (3)
Where Used
Driveshaft splines and U-joint
O-rings
6213
Bravo drive coupler
Where Used
Coupler
Section 5 - Maintenance
Part No.
92-802869A1
a
6212
Part No.
92-802869A1
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