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Tighten all three screws to 142-170 in. Ibs., 12-14
ft. Ibs. Fig. 22.
Fig. 22
Assemble the collar, blade and nut onto crankshaft.
Tighten blade nut to 45-50 ft. Ibs.
NOTE:
If the blade nut has been on and off four times it
should be replaced. If not replaced, apply OMC
Ultra Lock to threads of crankshaft before install-
ing nut.
SAFETY WARNING:
Check the torque of all fasteners under the deck.
for tightness. A loose fastener can become a
.thrown object.
Assemble the belt on the
drive pulley of the
cranksha'ft. With the idler pulley bracket loose, the
belt should assemble over the driven pulley very
easily. Fig. 24.
Fig. 24
Move the idler pulleys to apply tension on belt. Cor-
rect tension will be approximately 3/8" deflection
with firm finger pressure. Fig. 25. Rotate engine
several times to seat belt in grooves. Recheck belt
tension and adjust as necessary.
After completing the belt replacement, start and
run the mower
to check operation
of the drive
system.
Fig. 25
Fig. 23
20-6
SERVICE BULLETIN REFERENCES
OCTOBER 1984
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