Driveshaft Pinion Bearing Removal - Mercury 15 EFI FourStroke Service Manual

Gear Housing (2.15:1)
6. If the forward gear ball bearing must be replaced, use a suitable mandrel, press, and universal puller plate to remove the
bearing from the forward gear.
c
b
a
Universal Puller Plate
7. Inspect the propeller shaft forward gear bushing surface to determine the condition of the forward gear bushing. If the
surface is discolored from lack of lubricant, pitted, or worn, the propeller shaft and forward gear should be replaced.

Driveshaft Pinion Bearing Removal

IMPORTANT: Do not remove the lower driveshaft pinion bearing from the gear housing unless replacement is necessary. The
removal process will damage the bearing.
1. Inspect the pinion bearing surface on the driveshaft. Replace the driveshaft if it is pitted, grooved, scored, worn unevenly,
discolored from overheating, or has embedded particles.
IMPORTANT: Remove the forward gear assembly from the gearcase before removing the pinion bearing. Failure to
remove the forward gear assembly will result in the pinion bearing hitting against the forward gear during removal. The
pinion gear tool will bind in the pinion bearing bore, making the removal of the tool difficult and possibly causing damage to
the gearcase.
2. Inspect the pinion bearing for signs of damage.
Page 6A-24
d
a
a
© 2018 Mercury Marine
a - Universal puller plate
b - Ball bearing
c - Mandrel
d - Forward gear
7046
91‑37241
a - Forward gear bushing surface
6700
a - Pinion bearing surface
7070
90-8M0125265 eng NOVEMBER 2017