![Mercury 3.0 MPI ECT Operation & Maintenance Manual Download Page 72](http://html1.mh-extra.com/html/mercury/3-0-mpi-ect/3-0-mpi-ect_operation-and-maintenance-manual_1773505072.webp)
Section 4 - Maintenance
Page 64
90-8M0113856
eng
DECEMBER 2015
Driveshaft U‑joint Splines and O‑Rings (Sterndrive Unit Removed)
1. Apply grease to the driveshaft U‑joint splines and O‑rings.
a -
Driveshaft U‑joint splines
b -
O‑rings (3)
Tube Ref No.
Description
Where Used
Part No.
Extreme Grease
Driveshaft U-joint splines and O-rings
8M0071842
2. For propeller shaft lubrication, refer to
Propellers
.
Engine Coupler
Lubricate the 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, the coupler should be lubricated every 50 hours.
a -
Grease fitting
Tube Ref No.
Description
Where Used
Part No.
Extreme Grease
Coupler
8M0071842
NOTE: 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.
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.
b
a
8591
a
6213