IGNITION SYSTEM
CS-501SX, CS-501SXH
501sx
15
3-2 Testing spark
1. Remove cleaner lid, air fi lter and cylinder cover.
Remove spark plug cap from spark plug.
2. Connect Spark tester 897800-79931 (A) to high
tension lead and connect tester lead (B) on spark
plug.
3. Screw in adjuster (a1) until the needle tips con-
tact. Turn out adjuster (a1) 4 turns to set spark
tester gap (a2) to 4 mm (0.16 in).
4. Turn ignition switch to “I” position. Pull starter
grip several times.
5. If spark is steady blue or white at the tester gap,
ignition system is considered good. Go to inspect-
ing spark plug.
6. If no spark exists or spark is intermittent in
yellow, orange, or red, continue with further inspec-
tion.
DANGER
*Do not test near spark plug hole without
spark plug installed, otherwise there is a
chance to ignite fuel mixture inside cylinder.
*Do not touch metal parts of spark tester
while performing the test to avoid receiving
electrical shock.
*
Do not check spark in area where gasoline
is spilled or fl ammable gases may exist.
3-3 Inspecting spark plug
1. Remove spark plug to inspect for spark plug gap
fouling, cracked or broken insulator, cracked outer
electrode, or rounded center electrode. Replace
spark plug as required.
Spark plug gap (A) standard
: 0.6 to 0.7 mm (0.024 to 0.028 in)
2. If engine does not start with correct spark plug,
inspect if spark plug is wet or dry. If it is exces-
sively wet or dry, inspect fuel system.
B
a1
A
a2
GASO
LINE
A
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