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Chapter 5
FLYWHEELS
This engine uses one of two types of flywheels. The
first type is a cast iron high inertia flywheel. This type of
flywheel will have a pressed on steel ring gear if the
engine is equipped with an electric starter. The steel
ring gear is nonserviceable. The second and most
popular style of flywheel is diecast aluminum. The
aluminum flywheel features a replaceable plastic fan
and a nonserviceable plastic ring gear when equipped
with an electric stater. Disconnect battery before
servicing.
FLYWHEEL REMOVAL. Remove the ignition module.
Remove the brake pressure from the flywheel. The brake
can be locked in the disengaged position by placing a
pin into one of the aligned holes in the backing plate
lever assy.
To remove the flywheel nut, use a flywheel strap wrench
(670305) to hold the flywheel, while turning the flywheel
nut counterclockwise.
On engines with cored holes (not tapped) use flywheel
puller Part No. 670306.
Screw the knock-off (no. 670169) tool down until it
touches the flywheel, then back off 1 turn. Using a large
screwdriver, pry upward under the flywheel (side
opposite the brake) and tap sharply and squarely on
the knock-off tool to break the flywheel loose. If
necessary rotate flywheel a half turn and repeat until it
loosens.
NOTE: Do not attempt to remove flywheel using a jaw
type puller on the outer diameter of the flywheel or
flywheel breakage will occur.
NOTE: Never use a pry bar with any type of curve on
the end. Breather cover damage can result.
Lift the starter cup and fan off of the flywheel. (Aluminum
flywheel only)
Remove the flywheel using a flywheel puller or knock-
off tool.
DROP PIN THROUGH
TO DISENGAGE BRAKE
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