Mercury Optimax 115 Service Manual page 443

LEFT HAND NON-RATCHETING
9. Dial Indicator registers amount of backlash, which should be 0.030 in. to 0.050 in.
(0.76 mm to 1.27 mm).
a -
b -
c -
d -
e -
NOTE: If reverse gear backlash is not within specifications, then gear case is not properly
assembled or component(s) within gear case are excessively worn and must be replaced
before returning gear case to service.
10. Remove Driver Tool, Pilot Ring, Retainer and Screw from gear case.
Forward Gear
DETERMINING FORWARD GEAR BACKLASH
1. Install a load washer (12-37429) over a 44-93003 propeller shaft so that it seats
against the REAR shoulder of the clutch spline teeth.
a -
b -
c -
Page 6B-42
e
a
b
Stud Adaptor (from 91-14311A1)
Stud
Backlash Indicator Tool (91-78473)
Dial Indicator Holder (91-89897)
Dial Indicator (91-58222A1)
f - Dial Indicator Pointer
b
a
Load Washer (12-37429)
Shoulder
Propeller Shaft (44-93003)
d
f
c
c
51880
55088
90-855347R1 JANUARY 1999