Mercury BRAVO Service Manual page 301

SERVICE MANUAL NUMBER 28
8. Front driven gear shimming.
90-863160 MAY 2000
a. Remove clamp plate, O-ring, spacer and shim(s), and place drive shaft retaining tool
on tab washer as shown. Do not tighten locking bolt at this time.
a - Drive Shaft Retaining Tool (P/N 91-805381)
b - Tab Washer
c - Locking Bolt
b. Position gear housing so that propeller shafts are facing up in the vertical position.
Rotate propeller shafts several times to seat bearings prior to making checks.
c. Lightly press down on drive shaft retaining tool, while simultaneously turning shaft,
to ensure bearings are seated in bearing cups, then tighten locking bolt to retain
drive shaft.
d. Install backlash indicator rod to inner propeller shaft as shown. Mount dial indicator
to bearing carrier and position probe on mark stamped in indicator rod.
a - Backlash Indicator Rod
b - Inner Propeller Shaft
c - Dial Indicator
e. Check total gear/spline backlash by lightly rotating inner propeller shaft back and
forth. Observe dial indicator and record reading.
f. From the Gear/Spline Lash reading checked earlier, subtract reading obtained from
Propeller Shaft Spline Lash Check. Actual gear backlash should be between
.012-.016 in. (0.3-0.4 mm).
a
c
b
b
c
BRAVO THREE GEAR HOUSING
a
72623
72908
Page 3D-39