Inspection; Upper Drive Shaft Bearing; Pinion Gear Bearing; Pinion Gear - Mercury 40 Service Manual

Inspection

Upper Drive Shaft Bearing

1. Inspect bearing for rust, roughness or discolor-
ation from lack of lubricant.
2. DO NOT remove bearing from drive shaft unless
bearing must be replaced, as removal process
will damage bearing.
3. If bearing must be replaced, position drive shaft
assembly in vise (jaws of vise supporting only
bearing) and while holding drive shaft, strike top
of drive shaft with lead hammer and drive bearing
off.
a - Bearing
4. To install new bearing, thread old pinion nut 3/4
way onto drive shaft. Position Universal Puller
Plate (91-37241) under bearing and press on pin-
ion nut while holding drive shaft until bearing
seats against shoulder.
a - Old Pinion Nut (Nut Should be Above Drive Shaft)
b - Bearing
c - Universal Puller Plate (91-37241)
90-852572R1 JANUARY 1998

Pinion Gear Bearing

1. Inspect bearing for rust, roughness or discolor-
2. If bearing is damaged, bearing and race must be
3. If race appears to have spun in drive shaft bore,
a - Bearing
b - Race

Pinion Gear

a
1. Inspect pinion gear teeth for rust, chipping, ex-
2. If pinion gear teeth are damaged, also inspect
3. Replace gears as required.
a
b
c
52387
ation from lack of lubricant.
replaced as an assembly.
gear case housing must be replaced.
a
b
cessive wear (teeth are sharp edged) or broken.
forward and reverse gear teeth for damage.
52823
52839
LOWER UNIT - 6A-15