Mercury 50 Service Manual

BIGFOOT GEAR HOUSING
90-828631R3 MARCH 1999 Page 6B-21
Pinion Gear, Driveshaft, and Forward Gear
1. Hold driveshaft using Driveshaft Holding Tool; remove (and discard) pinion nut.
Model Driveshaft Holding Tool
40/50 Bigfoot (4-Stroke) 91-56775
60 Bigfoot 91-817070
75/90/100/115/125 91-56775
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.
19175
a
b
c
d
e
f
a-Driveshaft Holding Tool
b-Pinion Nut
c-Driveshaft
d-Pinion Gear
e-Bearing
f-Forward Gear

Mercury 50 Specifications

General

Horsepower	50 hp
Cylinders	3
Steering	Remote
Starting	Electric
Displacement	995 cc
Fuel Induction System	EFI (Electronic Fuel Injection)
Alternator Output	18 amp
Shaft Length	20" / 508 mm
Dry Weight	112 kg
Engine Type	4-Stroke