8-39
Shimming (regular rotation model)
Selecting the forward gear shim (T1)
and reverse gear shim (T2)
1. Select:
• Forward gear shim (T1)
• Reverse gear shim (T2)
• Do not reuse shims.
• For forward gear shim (T1), use only 1 shim
to obtain the specified shim thickness.
• For reverse gear shim (T2), use up to 3 shims
to obtain the specified shim thickness.
Selecting the pinion shim (T3)
• Spray anti-rust lubricant on the gears and
bearings before installation. Do not apply
gear oil to the parts. Otherwise, correct mea-
surements cannot be obtained.
• Keep the parts free of foreign material, such
as dirt and lint.
Be careful not to damage the measurement
plane surface of the special service tool.
Otherwise, correct measurements cannot
be obtained.
1. Disassemble:
• Lower unit
See “Water pump and shift rod” (8-11),
“Propeller shaft housing (regular rotation
model)” (8-18), and “Drive shaft and lower
case (regular rotation model)” (8-27).
2. Install:
• Adapter assembly
• Specified forward gear shim (T1)
• Forward gear assembly
See “Installing the forward gear” (8-34).
3. Install:
• Original pinion shim (T3)
• Spacer
• Drive shaft assembly
•Pinion
• Pinion nut
• Spacer
• Drive shaft ring nut
See steps 1 and 2 in “Installing the drive
shaft” (8-34).
• If the original shims (T3) are missing, install
new shims with a combined thickness of
0.95 mm.
• Do not reuse shims (T3) if deformed or
scratched.
4. Measure:
• Distance “a”
a. Check that the drive shaft turns
smoothly.
b. Set up the special service tools “1” and
“2”, and then remove the special ser-
vice tool “2”.
c. Measure the distance “a” between the
special service tool “1” and the pinion
“2”.
d. Turn the drive shaft 90° clockwise and
measure the distance again.
Shim thickness (T1)
2.15 mm
Shim thickness (T2)
0.75 mm
Pinion shimming gauge “1”
90890-06948
Pinion shimming gauge rod “2”
90890-06676
Pinion shimming gauge “2”
YB-06835
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