CS-350WES
16
IGNITION SYSTEM
3-2 Testing spark
1. Remove spark plug cap from spark plug. Remove
sprocket guard, guide bar and chain.
2. Connect spark tester 897800-79931 (A) to high
tension lead and set crip (B) on spark plug.
3. Screw in adjuster (C) until the needle tips contact.
Turn out 4 turns to set the spark tester gap (D) to 4
mm (0.16 in).
4. Turn ignition switch to “RUN” position. Pull starter
grip several times.
5. If spark is steady in blue or white at the tester
gap, the ignition system is considered good. Go to
checking spark plug.
6. If no spark exists or spark is intermittent in yellow,
orange, or red, continue with further test.
WARNING DANGER
*Do not test near the spark plug hole without
spark plug. Otherwise there is a chance to
fire mixture fuel inside cylinder and be injured
due to fire.
*Do not touch metal parts of spark tester
while performing the test to avoid receiving
electrical shock.
WARNING DANGER
Do not check spark in area where gasoline is
spilled or flammable gases may exist.
3K069
A
B
GASO
LINE
A
D
B
C
3-3 Checking spark plug
1. When engine can not start with correct spark by
ignition checker testing, remove spark plug to check
for fouling, cracked or broken insulator, or rounded
center electrode. Replace with new one or clean
the plug electrodes and insulator as required.
2. Set spark plug gap (A) to 0.6 to 0.7 mm (0.024 to
0.028 in) by bending outer electrode (B).
3. If engine does not start after cranking several
times, check if spark plug is wet or dry. If it is
excessively wet or dry, check fuel system.
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