Replacing Ignition Coil; Setting Pole Shoe Air Gaps - Yamabiko ECHO SRM-420ES Service Manual

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3-8 Replacing ignition coil

D

3-9 Setting pole shoe air gaps

B
C
IGNITION SYSTEM
1. Loosen two bolts (A) of ignition coil.
2. Remove ignition coil with primary lead (B) and
A
grommet (C) from crankcase, taking care not to
lose collars (D).
3. Disconnect primary lead (B) with grommet (C)
from ignition coil.
B
4. Remove spark plug cap and spark plug cap coil
from high tension lead (Refer to "3-7 Replacing
C
spark plug cap and coil").
5. Install spark plug cap and spark plug cap coil,
primary lead (B) with grommet (C) to new ignition
coil.
6. Set collars (D), facing fl ange side to the crank-
case as shown.
B
7. Tip primary lead (B) to high tension lead as
shown.
8. Loosely install new ignition coil, primary lead (B)
and grommet (C) with two bolts (A) as shown. Set
pole shoe air gaps (Refer to "3-9 Setting pole shoe
air gaps"). Tighten two bolts (A).
1. Loosen two bolts (A) and insert module air gap
D
gauge 91004 (B) or 0.3 - 0.4 mm (0.012 - 0.016 in)
thick feeler gauge between fl ywheel (C) and igni-
tion coil shoes (D).
A
2. Rotate fl ywheel (C) until magnetic poles of fl y-
wheel face ignition coil shoes (D).
3. Hold ignition coil against fl ywheel (C) and tight-
en bolts (A). After tightening the bolts, remove
module air gap gauge 91004 (B) or feeler gauge.
NOTE: When air gap is too narrow, contact with
fl ywheel may result. When the air gap is too wide,
spark is weak.
SRM-420ES, SRM-420TES
T410S, B410S
T410TS, B410TS
D