Water Pump Installation - Yamaha 50G Service Manual

LOWR
SHIM SELECTION
1
2
75, 80, 90 hp:
Reverse gear
backlash
Less than
0.67 mm (0.026 in)
0.67 – 1.00 mm
(0.026 – 0.039 in)
More than
1.00 mm (0.039 in)
164000-0

WATER PUMP INSTALLATION

1. Install a new oil seal in the oil-seal
housing, and fit a new O-ring in the O-
ring groove.
Driver rod:
YB-6071.................................. 1
Oil seal attachment:
YB-6269.................................. 2
2. Grease the O-ring and the lip of the oil-
seal, then install the oil-seal housing
complete to the gear-case and fit the
dowel-pins.
3. Aligning with the dowel-pins, install a
new gasket, a plate and a new gasket on
the oil-seal housing.
4. Install a key in the keyway on the drive-
shaft and insert a impeller.
5. Grease the impeller and install the
water-pump housing, turning the drive
shaft clockwise, then tighten the bolts.
6-28
Decrease or increase
Thickness of shim to be
increased (mm) = (0.84 –
measurement) × 0.60
Decrease or increase will
be unnecessary
Thickness of shim to be
decreased (mm) = (mea-
surement – 0.84) × 0.60
E