Mercury 40 Service Manual page 527

Pinion Gear, Driveshaft, and Forward Gear
1. Hold driveshaft using Driveshaft Holding Tool; remove (and discard) pinion nut.
40/50 Bigfoot (4-Stroke)
60 Bigfoot
75/90/100/115/125
2. Remove driveshaft, pinion gear, bearing and forward gear.
3. Replace pinion gear if it is chipped or worn.
4. Replace bearing and race if either are rusted, pitted or damaged; or if bearing does not
roll freely. To remove race, refer to "Lower Driveshaft Bearing Race," following.
5. Replace forward gear if gear teeth or clutch teeth are chipped or worn.
a -
b -
c -
d -
e -
90-828631R3 MARCH 1999
Model
a
d
b
Driveshaft Holding Tool
Pinion Nut
Driveshaft
Pinion Gear
Bearing
f - Forward Gear
Driveshaft Holding Tool
c
e
f
BIGFOOT GEAR HOUSING
91-56775
91-817070
91-56775
19175
Page 6B-21