Forward Gear; Pinion Gear/Drive Shaft Assembly - Mercury 40 Service Manual

Forward Gear

1. Apply Super Duty Gear Lubricant to O.D. of race.
Install forward gear bearing race into housing us-
ing Mandrel 91-36571 and propeller shaft. Use a
lead hammer on prop shaft to prevent damage to
threads. Bearing carrier should be installed to
keep prop shaft centered while seating race.
Super Duty Gear Lubricant (92-850737A1)
87
a - Race
b - Mandrel (91-36571)
NOTE: Remove drain plug/magnet assembly from
gear case (if installed) to prevent possible breakage
of magnet if struck by forward gear.
1. Install forward gear and bearing assembly into
forward gear race.
a
a - Forward Gear Assembly
90-852572R1 JANUARY 1998
b
87
52843
a
52870

Pinion Gear/Drive Shaft Assembly

1. Clean pinion nut and pinion nut threads of drive
shaft with Loctite Primer T.
2. Position pinion bearing into race while installing
drive shaft and pinion gear into housing.
3. Apply Loctite 271 to pinion nut threads.
4. Install new pinion nut, with rounded corners FAC-
ING pinion gear, onto drive shaft.
Model
25, 45/50 (4-Stroke)
Force 40/50
30/40, 40/50
5. Using Drive Shaft Holding Tool to hold drive shaft,
torque pinion nut to 50 lb. ft. (67.8 N·m).
c
b
7
a
Loctite "271" (92-809819)
7
a - Pinion Nut [Torque to 50 lb. ft. (67.8 N·m)]
b - Pinion Gear
c - Pinion Bearing
d - Drive Shaft Holding Tool
Drive Shaft Holding Tool
91-83180M
91-825196
91-825196
51043
d
52864
LOWER UNIT - 6A-23