Product Manual

2. Inspect the driveshaft for grooves where the water pump base oil seals contact the shaft. Replace the driveshaft if grooves
are found.
a - Water pump oil seal surface
Upper Driveshaft Bearing Inspection
IMPORTANT:
Do not remove the upper driveshaft ball bearing from the driveshaft unless replacement is necessary. The
removal process will damage the bearing.
1. Inspect the upper driveshaft ball bearing for rust, roughness, or excessive wear.
2. If the bearing is not in serviceable condition, use a suitable mandrel, press, and universal puller plate to remove the
bearing from the driveshaft.
3. To install the new bearing, place the bearing onto the driveshaft. Partially thread the old pinion nut onto the driveshaft.
Place the driveshaft assembly into the press and apply pressure to the old pinion nut to push the driveshaft through the
new bearing until the bearing seats against the ledge of the driveshaft.
a - Universal puller plate
b - Upper driveshaft bearing
c - Ledge
d - Old pinion nut
Universal Puller Plate 91‑37241
Gear Housing Assembly
Pinion Bearing Installation
1. Remove the sleeve from the pinion bearing tool.
2. Apply Premium Gear Lubricant to the inside diameter and outside diameter of the new pinion bearing. Install the pinion
bearing with numbers/letters facing up toward the pinion bearing tool.
Tube Ref No. Description Where Used Part No.
82
Premium Gear Lubricant Inside diameter and outside diameter of pinion bearing 92-858058K01
a
6708
a
b
c
d
7047
Gear Housing (2.15:1)
Page 6A-26 © 2018 Mercury Marine 90-8M0125265 eng NOVEMBER 2017