Mercury 4 SERIES User Manual

GEAR HOUSING
Page 6-22 90-857138R1 MAY 2000
Drive Shaft
1. Replace drive shaft if any of the following conditions exist:
a. Splines are twisted or worn.
b. Lower drive shaft needle bearing race surfaces are pitted or worn. Replace corre-
sponding bearing as well.
c. Oil seal surfaces are deeply grooved or pitted allowing grease to wash off crankshaft
splines or water to enter gear housing.
a
b
ac
c
a - Splines
b - Bearing Race Surface
c - Oil Seal Surface
Shift Shaft
Inspect shift shaft/cam for signs of wear, damaged roll pins or bent shaft.
56436
Gear Housing Reassembly
Lower Drive Shaft Needle Bearing
1. Place drive shaft needle bearing onto end of driver rod of bearing removal/installation
tool. (Numbered side of bearing toward tool.)
91-17351
a
b
56437
a - Drive Shaft Needle Bearing
b - End of Driver Rod

Mercury 4 SERIES Specifications

General

Brand	Mercury
Model	4 SERIES
Category	Outboard Motor
Language	English