20
IGNITION SYSTEM
CS-370ES
CS-420ES
3-10 Inspecting flywheel and key
1. Inspect magnetic force of flywheel using flux
meter, or bridging with a screwdriver.
2. If magnetic force is weak, replace flywheel as
follows.
3. Install piston stopper 897537-30130 (A) into spark
plug hole by hand, to stop crankshaft rotation.
NOTE: Do not use power tool. Otherwise, piston
damage may occur.
4. Remove starter pawls. Then set puller 897501-
03938 (B) on flywheel as shown.
5. Tighten 2 nuts on the puller alternately to remove
flywheel.
6. Inspect woodruff key for damage or shearing.
Replace as required.
7. Wipe off oil from taper part of crankshaft before
assembling flywheel.
8. Install woodruff key into key groove.
9. Reinstall starter pawls (Refer to “2-4 Replacing
starter pawl”).
10. Align flywheel key groove with woodruff key on
crankshaft. Install flywheel and fasten flywheel nut.
B
A
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