Testing Spark; Inspecting Spark Plug - Echo shindaiwa PB-8010 Service Manual

16

3-2 Testing spark

C
a4

3-3 Inspecting spark plug

IGNITION SYSTEM
B
a1
A
WARNING
*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.
Using Spark tester 897800-79931 (A)
1. Pull off spark plug cap (B).
a2
2. Push high tension terminal (a1) onto spark plug
cap (B). Connect ground terminal (a2) to spark
a3
plug (C).
3. Screw in adjuster (a3) until the needle tips
contact. Turn out the adjuster 4 turns to set spark
tester gap (a4) to 4 mm (0.16 in).
A
4. Pull the 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.
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:
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.
PB-8010, EB810
DANGER
0.6 to 0.7 mm (0.024 to 0.028 in)