Backlash; Measuring The Forward Gear Backlash - Yamaha F90D Service Manual

NOTE:
Tighten the nut four turns after it contacts the
spring.
Forward gear shim selecting tool:
YB-34446-1 2, YB-34446-3 3,
YB-34446-5 4, YB-34446-7 5
3. Measure the clearance (M) between the
gauge pin and the press plate.
4. Select the forward gear shims (T1).
NOTE:
The sum of T1 and M should not be more
than M0.
Calculation formula:
Forward gear shim thickness (T1) =
M0 – M
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
6D81G11
Shimming / Backlash

Backlash

Measuring the forward gear backlash

1. Remove the water pump assembly.
NOTE:
Do not remove the oil seal housing in this
procedure.
2. Set the gear shift to the neutral position
at the lower unit.
Shift rod push arm: YB-06052
3. Install the special service tools so that it
pushes against the propeller shaft.
NOTE:
Tighten the universal puller while turning the
drive shaft until the drive shaft can no longer
be turned.
Bearing housing puller 1:
YB-06207
Universal puller 2: YB-06117
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