90-824052R3 JUNE 2002 LOWER UNIT - 6A-47
8. Lightly turn driveshaft back-and-forth (no move-
ment should be noticed at propeller shaft).
9. Backlash specifications:
Gear Case &
Ratio
Backlash
Inches (mm)
Dial Indicator
Pointer on
Line Mark
Production
1.87:1
.018-.027
(.46-.69)
#1
91-78473
CLE/Torque
Master/Sport
Master 1.87:1
.021-.026
(.53-.66)
#1
91-78473
All 2.00:1 .015-.022
(.38-.56)
#2
91-78473
All High Alti-
tude 2.3:1
.018-.023
(.46-.58)
#1
91-19660
10. If backlash is LESS than the specified minimum,
REMOVE shim(s) from in front of forward gear
bearing race to obtain correct backlash. When
reinstalling pinion nut, apply Loctite 271 on
threads of nut.
11. If backlash is MORE than the specified
MAXIMUM, add shim(s) in front of forward gear
bearing race to obtain correct backlash. When
reinstalling pinion nut, apply Loctite 271 on
threads of nut.
NOTE: By adding or subtracting 0.001
″
(0.025mm)
shim, the backlash will change approximately 0.001
″
(0.025mm).
REVERSE GEAR
Determining Reverse Gear Backlash
Although reverse gear backlash is not adjustable, it
may be checked as follows:
1. Propeller shaft and bearing carrier must be com-
pletely assembled and installed in gearcase.
2. Install shift shaft in gearcase.
3. Shift gearcase into reverse.
4. Slide 6 in. x 1.5 in. I.D. (152.5mm x 38.0mm)
piece of PVC pipe over propeller shaft and
position pipe against bearing carrier.
5. Secure pipe against carrier with propeller nut and
tab washer.
a
b
c
51866
a - Pipe [6 in. x 1.5 in. (152.4mm x 38.1mm)]
b - Propeller Nut
c - Tab Washer
6. Torque propeller nut to 45 lb. in. (5.0 N·m).
7. Gently rock driveshaft. Dial indicator should
show backlash of 0.030″-0.060″ (0.762mm-
01.54mm).
If backlash is not as indicated, gear case is not
properly assembled or parts are excessively worn
and must be replaced before returning gear case to
service.
DRIVE SHAFT END PLAY (SPORT MASTER
ONLY)
IMPORTANT: Pinion depth MUST BE DETER-
MINED BEFORE setting drive shaft lower tapered
bearing shim height.
1. With pinion height set in previous steps, remove
the preload tool from the driveshaft.
2. Remove the upper bearing cup retainer with tool
91-43506, and remove cup [leave upper cup
shim(s) in place].
To Next Page
Loading...
Need help?
General
