IGNITION SYSTEM
CSG-7410ES
EC741S
18
3-7 Replacing ignition coil
1. Remove cylinder cover assembly, filter case,
cover stay (Refer to “4-1 Replacing air filter” and
“4-5 Removing carburetor, fuel line and tank vent”).
2. Remove starter assembly and fan cover (Refer
to “2-1 Disassembling starter assembly“).
3. Disconnect switch lead terminal (B) from ignition
coil. Loosen 2 pre-coated bolts (A).
4. Remove ignition coil (C) from crankcase.
5. Remove spark plug cap and spark plug cap coil
from high tension lead (D) (Refer to “3-4 Replacing
spark plug cap and coil”).
6. Install spark plug cap and spark plug cap coil to
new ignition coil (C)(Refer to “3-4 Replacing spark
plug cap and coil”).
7. Loosely install new ignition coil (C) with 2 pre-
coated bolts (A). Set air gap (Refer to “3-8 Setting
pole shoe air gaps“). And then tighten 2 pre-coated
bolts (A).
NOTE:
If the coat is peeled off, replace new one or
apply ThreeBond #1344 or equivalent. If old thread
locking sealant is left in threads, correct torque
may not be secured. In case old thread locking
sealant is left, remove it.
8. Connect switch lead terminal (B) to ignition coil.
9. Pass high tension lead (D) over switch lead as
shown.
NOTE:
When reinstalling fan cover, refer to the
note on page 20.
B
A
D
C
3-8 Setting pole shoe air gaps
1. Insert Module air gap gauge: 91004 or 0.3 - 0.4
mm (0.012 - 0.016 in) thick feeler gauge (B) be-
tween flywheel and ignition coil shoes.
2. Rotate magneto rotor (C) until magnetic poles of
magneto rotor face ignition coil shoes (D).
3. Hold ignition coil against magneto rotor (C) and
tighten 2 bolts (A) to specified torque (Refer to “1-3
Torque limits”). After tightening 2 bolts (A), remove
feeler gauge (B) or Module air gap gauge: 91004.
NOTE:
When air gap is too narrow, contact with
magneto rotor may result. When the air gap is too
wide, spark is weak.
A
C
B
D
