Replacing Ignition Coil; Setting Pole Shoe Air Gaps; Checking Flywheel And Key - Echo PB-251 Service Manual

PB-251

3-8 Replacing ignition coil

(A)
(D)

3-9 Setting pole shoe air gaps

(A)

3-10 Checking flywheel and key

IGNITION SYSTEM
1. Remove stop lead grommet (A) and high tension
(E)
lead grommet (B) from cylinder cover.
2. Remove ignition coil (C) from cylinder.
(B)
3. Pull out stop lead (D) from ignition coil.
4. Remove high tension lead (E) from cylinder cover,
and then remove spark plug cap and spark plug cap
cover from high tension lead.
5. Reinstall the above parts to new ignition coil.
6. Temporarily install ignition coil and grommets to
cylinder.
(C)
7. Proceed to "3-9 Setting pole shoe air gaps".
1. Loosen ignition coil bolts and insert module air
gap gauge 91004 (A) between flywheel and ignition
coil.
2. Rotate flywheel until the flywheel magnets align
with the ignition coil legs.
3. Hold ignition coil against module air gap gauge
and tighten bolts.
Standard gaps: 0.3 - 0.4 mm (0.012 - 0.016 in)
NOTE: If air gaps are too wide, this system will not
generate sufficient energy and give a weak spark
or an incorrect ignition timing. If the gaps are too
close, the ignition coil can interfere with the flywheel.
1. Rotate flywheel until the magnets are visible.
2. Check magnetic force of flywheel using flux meter
or bridging with a screwdriver and comparing with a
good one.
3. If it is defective, replace with new one.
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