BIGFOOT GEAR HOUSING
90-857046R1 NOVEMBER 2001 Page 6B-63
9. Shift gear housing into forward gear position. In forward gear the gear housing will ratch-
et when propeller shaft is turned clockwise. Resistance will be felt when propeller shaft
is rotated counterclockwise.
10. Apply Loctite Grade 271 on threads of gear housing retaining screws.
NOTE: During installation of gear housing, it may be necessary to move the shift block (lo-
cated under cowl) slightly to align upper shift shaft splines with shift shaft coupler splines.
NOTE: On 75/90 hp (4-Stroke) models. If, while performing Step 11, the drive shaft splines
will not align with the oil pump splines, place a propeller onto propeller shaft and turn it coun-
terclockwise as the gear housing is being pushed toward drive shaft housing. Continue ro-
tating the propshaft until the driveshaft splines align with the crankshaft splines.
IMPORTANT: 75/90 hp (4-Stroke) models, when removing or installing gearcase,
carefully guide driveshaft through driveshaft bushing to avoid scoring bushing sur-
face.
11. Position gear housing so that the driveshaft is protruding into driveshaft housing.
12. Move gear housing up toward driveshaft housing, while aligning upper shift shaft splines
with shift shaft coupler splines, water tube with water tube seal, and crankshaft splines
with driveshaft splines.
13. Install 4 fasteners and washers (two each side). Install locknut and washer.
14. Torque bolts and locknut (or nuts only if applicable) to specified torque.
53922
a
b
7
Loctite “271”
7
a- Fasteners and Washers (2 Each Side)
b- Locknut and Washer
Screw or Nut Torque
40 lb-ft (54 Nm)
15. Check shift operation as follows:
• Place shift lever in forward gear. Gear housing should ratchet when propeller shaft is
turned clockwise. Resistance should be felt when propeller shaft is turned counter-
clockwise.
• Place shift lever in neutral. Propeller shaft should rotate freely in either direction.
• While rotating propeller shaft, place shift lever in reverse gear. Resistance should be
felt when propeller shaft is rotated in either direction.
IMPORTANT: If shift operation is not as described above, the gear housing must be
removed and the cause of the problem corrected.
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