6C-18 - LOWER UNIT 90-817643R1 DECEMBER 1996
Installing Jet Drive to Drive Shaft
Housing
1. Apply a light coat of 2-4-C w/Teflon to the drive
shaft splines. DO NOT APPLY GREASE TO THE
TOP OF THE DRIVE SHAFT AS THE GREASE
WILL PREVENT THE DRIVE SHAFT FROM FUL-
LY ENGAGING THE CRANKSHAFT AND DAM-
AGE TO THE POWERHEAD AND/OR GEAR
CASE WILL RESULT.
2. Carefully slide jet drive into drive shaft housing
while aligning drive shaft splines with crankshaft
and the water tube with the water pump cover seal.
3. Secure jet drive to drive shaft housing with 4 bolts.
Torque bolts to 25 lb. ft. (34.0 N·m)].
54165
a
a
a - Bolts [Torque to 25 lb. ft. (33.9 N·m)]
4. Secure aft end of jet drive to drive shaft housing
with bolt and washer. Torque bolt to 22.5 lb. ft. (30
.5 N·m).
a
a - Bolt and Washer [Torque to 22.5 N·m)]
5. Grease the drive shaft, shear key, and impeller
bore. Place the plastic sleeve (a) inside the impel-
ler (b) and install impeller, shear key (c), shims (d)
nut retainer (e), and impeller nut (f). Turn the nut
tight on the shaft to remove any play between the
impeller and shaft. If the tabs on the retainer do not
line up with the flats on the nut, remove the nut and
turn the retainer over and re-tighten the nut again.
a
b
c
d
e
f
a - Plastic Sleeve
b - Impeller
c - Shear Key
d - Shims
e - Nut Retainer
f - Impeller Nut
6. Temporarily reinstall the water intake housing in or-
der to check for impeller clearance. The clearance
between the impeller and liner should be 0.030 in.
(0.8 mm). Shim washers can be transferred to ei-
ther side of the impeller to raise or lower the impel-
ler to the correct clearance setting. The water in-
take housing can be shifted side ways a small
amount in order to center the liner.
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