IGNITION SYSTEM
34
Flywheel Operation
The flywheel is connected directly to the crankshaft
(secured by a flywheel key and nut) and turns at the
same speed as the crankshaft. Two permanent
ma
nets, imbedded in the flywheel, rotate past the coil
in the CD Pack to be
in the
eneration of electricity.
Imbedded in the opposite side of the flywheel are steel
counterwei
hts which offset the wei
ht of the ma
nets.
These counterwei
hts are not ma
netic.
A flywheel key and keyway in the flywheel and
crankshaft are used to assure ali
nment durin
assembly. The tapered fit of the flywheel and
crankshaft alon
with the torque of the bolt or nut
actually holds the parts to
ether. The surfaces of both
tapers must be
ood to obtain a
ood friction fit. The
key is desi
ned as a li
ht duty part so that if the en
ine
stops rapidly, due to blade impact, the key will shear. If
the key were too hard and the impact occurred, the
more expensive flywheel could crack.
Flywheel Removal
1. Remove shroud and fuel hoses.
2. Remove flywheel nut and starter cup. Reinstall nut
flush with the end of the crankshaft. (See Fi
ure
54.)
Figure 54
0893-21
3. Remove the flywheel by pullin
up on the ed
e of
flywheel while strikin
the flywheel nut with a soft
hammer. (See Fi
ure 55.)
Fi
ure 55
lbv0040b
4. Remove key and check its condition (see Fi
ure
56).
Figure 56
0893-006
5. Replace crankshaft and/or flywheel if keyway is
distorted or cracked.
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