Testing Spark; Inspecting Spark Plug - Yamabiko Echo SRM-2620ES Service Manual

18

3-2 Testing spark

a2
B

3-3 Inspecting spark plug

B
IGNITION SYSTEM
a1
A
A
SRM-2620ES, SRM-2620TES
1. 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 "RUN" position. Pull start-
er grip several times.
5. If spark is steady in blue or white at the tester
gap, ignition system is considered good. Go to in-
specting spark plug.
6. If no spark exists or spark is nonsequential in
yellow, orange, or red, continue with further inspec-
tion.
*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.
1. Remove spark plug to inspect for fouling,
cracked or broken insulator, or rounded center
electrode. Clean or replace spark plug as required.
2. Set spark plug gap (A) by bending outer elec-
trode (B).
Standard : 0.6 to 0.7 mm (0.024 to 0.028 in)
3. 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.
T262XS, C262S
T262TXS, C262TS
DANGER
DANGER