Mercury 225 EFI, Service Manual

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LEFT HAND NON-RATCHETING
Page 6B-72 90-884294 OCTOBER 2001
NOTE: If backlash needs to be adjusted, (see Checking Reverse Gear Backlash), adding
0.001 in. (0.03 mm) shims will reduce the gear backlash by approximately 0.001 in.
(0.03mm). Subtracting 0.001 in. (0.03mm) shims will increase backlash by approximate-
ly the same amount.
Example 1 (if backlash is too high)
Backlash checks:
(subtract) middle
of
specification:
You get:
.070 in.
.050 in.
.020 in.
(1.79 mm)
(1.27 mm)
(0.50 mm)
Example 2 (if backlash is too low)
Backlash checks:
middle of specification:
(subtract) You get:
.050 in.
.020 in.
.030 in.
(1.27 mm)
(0.50 mm)
(0.76 mm)
add this quantity of shims
subtract this quantity of shims
5. Loosen the backlash indicator tool and remove the propeller nut, washer and pinion
nut adaptor. Remove the dial indicator and all its mounting components. Do not re-
move the bearing preload tool. The following instructions give specific instruc-
tions for its removal.
Forward Gear/Bearing Carrier Assembly
CHECKING FORWARD GEAR BACKLASH
1. Install the appropriate spacer shim into the gear housing.
55428
a
a - Shim