Mercury 90-863160

BRAVO ONE GEAR HOUSING SERVICE MANUAL NUMBER 28
Page 3B-42 90-863160 MAY 2000
28. To determine overall gear case preload, add propeller shaft bearing preload (previously
recorded) to drive shaft bearing preload as outlined in the example below.
IMPORTANT: The overall preload includes both the drive shaft preload and the gear
case preload.
Preloads
New Propeller Shaft Bearings 8-12 lb-in. (.9-1.4 Nm)
2
Used Propeller Shaft Bearings
1
5-8 lb-in. (.6-.9 Nm)
2
Drive Shaft Bearings
3-5 lb-in. (.3-.5 Nm)
1
Bearing is considered used if spun under load even once (“under load” meaning: with power applied).
2
Plus drive shaft preload of 3-5 lb-in. (.3-.6 Nm)
Example:
Drive Shaft Preload. . . . . . . . . . . . 3 lb-in. (.3 Nm)
+
New Bearing Preload. . . . . . . . . . . . 8 lb-in. (.9
Nm)
11 lb-in. (1.2 Nm)
29. Tighten the retainer to the proper preload using the following procedure.
a. Tighten retainer nut in small increments using retainer wrench.
22112
a
a-Bearing Carrier Retainer Wrench (91-61069T)