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IGNITION SYSTEM
CS-370ES
CS-420ES
3-8 Replacing ignition coil
1. Disconnect spark plug cap from spark plug and
remove starter assembly and cylinder cover.
2. Disconnect primary lead (A) and ground lead (B)
from ignition coil. Loosen bolts (C) of ignition coil.
3. Remove ignition coil and spacers (refer to P14,
“3 IGNITION SYSTEM”) from cylinder.
4. Disconnect spark plug cap (D) and spark plug
cap coil from high tension lead (Refer to “3-7
Replacing spark plug cap and coil”).
5. Connect spark plug cap (D) and spark plug cap
coil, primary lead (A) and ground lead (B) to new
ignition coil.
6. Install ignition coil and spacers by two bolts (C)
loosely. After adjusting air gap using Module air gap
gauge : 91004 (Refer to “3-9 Setting pole shoe air
gauge“), tighten bolts (C) to specified torque.
7. Connect spark plug cap (D) to spark plug and
reinstall starter assembly and cylinder cover in place.
3-9 Setting pole shoe air gaps
1. Insert Module air gap gauge : 91004 (A) or 0.3 -
0.4 mm (0.012 - 0.016 in) thick feeler gauge between
flywheel and ignition coil.
2. Rotate flywheel until magnetic poles of flywheel
face ignition coil core legs.
3. Hold ignition coil against flywheel and tighten the
bolts. After tightening bolts, remove Module air gap
gauge : 91004 (A) (or feeler gauge) (Refer to
“Service information 1-3 Torque limits”).
NOTE : When air gap is too narrow, there is a chance
of interference with flywheel. When the air gap is
too wide, spark is weak.
A
A
B
C
D
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