Mercury BRAVO Service Manual page 303

SERVICE MANUAL NUMBER 28
Example:
Total Gear/Spline Backlash
(Reading - Step 9c Above):
Minus
Spline Lash (from Propeller
Shaft Spline Lash Check
from page 3D-22):
Equals
Actual Gear Backlash:
10. Check propshaft end play. Install dial indicator on propshaft as illustrated below. Move
11. Remove drive shaft retaining tool and reinstall shim(s), spacer and O-ring.
90-863160 MAY 2000
e. If backlash is not correct, disassemble and proceed as follows:
If backlash is more than specified, remove shims in front of rear driven gear bearing
cup.
If backlash is less than specified, add shims in front of rear driven gear bearing cup.
f. Recheck backlash reading after reassembly.
inner shaft up and down while reading dial indicator (ensure outer shaft is also being
lifted by inner shaft). End play reading should be between .001-.050 in. (0.025-1.27
mm). If reading is outside of range, the outer propeller shaft thrust race shims must be
increased or decreased to bring the end-play reading within this range (Refer to 3D-25).
a - Inner Propeller Shaft
b - Dial Indicator
.030 in. (0.75 mm)
.016 in. (0.4 mm)
.014 in. (0.35 mm)
b
a
BRAVO THREE GEAR HOUSING
75909
Page 3D-41