TOHATSU BFT250A Service Manual page 489

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SHIM SELECTION
SHIM POSITION
• Use shims to adjust the position of each gear so that
they engage properly. Perform shim adjustment if
the backlash of a gear is outside the specification or
after replacing the gear case, vertical shaft, propeller
shaft, or bearing with a new one.
TAPER BEARING (32 x 66 x 49 mm)
REVERSE BEVEL GEAR
BALL BEARING (55 x 100 x 21 mm)
REVERSE BEVEL GEAR SHIM
PROPELLER SHAFT
VERTICAL SHAFT
PINION GEAR SHIM
FLANGE
PINION GEAR
INTERNAL
CIRCLIP
Sr (SHIM THICKNESS)
C: 214.5 ± 0.15 mm
FORWARD BEVEL GEAR
GEAR CASE (STANDARD ROTATION)
H
F
PROPELLER SHAFT THRUST SHIM
GEAR CASE
FORWARD BEVEL
GEAR SHIM
TAPER BEARING (60 x 100 x 30 mm)
St (SHIM THICKNESS)
Sf (SHIM THICKNESS)
B: 72.5 ± 0.15 mm
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