Pre-Disassembly Inspection - Mercury BRAVO Service Manual

BRAVO ONE GEAR HOUSING

Pre-Disassembly Inspection

1. Check propeller shaft for side to side movement, as follows:
2. Check for a bent propeller shaft, as follows:
Page 3B-10
a. Position dial indicator on propeller shaft.
b. Push propeller shaft to one side and zero the dial indicator.
c. Move propeller shaft to opposite side while observing dial indicator.
d. Without rotating propeller shaft, reposition dial indicator and check up and down
deflection. A shaft deflection of more than .003 in. (0.08 mm) indicates one of the
following:
(1.) Worn propeller shaft bearings.
(2.) Improper propeller shaft preload.
a. Rotate propeller shaft while observing dial indicator. If deflection is more than .007 in.
(.178 mm), a bent propeller shaft is indicated.
SERVICE MANUAL NUMBER 28
22086
90-863160 MAY 2000