GEARCASE
SHIMMING ADJUSTMENTS
Forward Gear/Pinion Gear
Correctly assemble forward gear, pinion gear,
driveshaft, and
related components. Refer to
ASSEMBLY
on
p.
209.
Check that a slight amount
of
backlash exists
between pinion gear and forward gear by
slightly
rotating driveshaft or forward gear by hand.
• If there
is
no
backlash, reduce back-up shim
thickness.
• If there
is
too much backlash, increase back-up
shim thickness.
004404
Gear Tooth Contact Pattern
Apply a light coat of Prussian Blue
on
the convex
Rotate the driveshaft clockwise 5-6 times by hand.
004410
Pull out propeller shaft and housing to check tooth
contact pattern.
HEEL
-;-
Convex side
Approx.
1/3
of
tooth width
Approx.
1
mm
surface
of
forward gear.
Optimum
tooth
contact
004411
Install propeller shaft
and
housing assembly
(minus reverse gear and internal components).
Push propeller shaft inward and hold
in
position.
004409
214
If pattern
is
too high:
• Decrease forward gear shim thickness.
• Slightly increase pinion gear shim thickness.
If pattern
is
too low:
• Increase
forward gear shim thickness.
• Slightly decrease pinion gear shim thickness.
IMPORTANT: Damage and chipping
of
forward
and pinion gear may
result if tooth pattern
is
not
correct.
IMPORTANT: Recheck backlash if shimming
has been adjusted.
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