Echo CS-310, Service Manual

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IGNITION SYSTEM
CS-310
18
3-6 Inspecting ignition coil resistance
1. Remove cylinder cover.
2. Connect one probe of Ohm-meter or multimeter
to spark plug cap coil (A).
3. Connect the other probe to cylinder fin (B) to
measure secondary coil resistance. Secondary
coil resistance should be in the range of 1.9 to 2.3
k
Ω .
4. I f t h e m e t e r r e a d i n g i n d i c a t e s i n fi n i t e
r e s i s t a n c e , remove spark plug cap and spark
plug cap coil, and measure resistance between the
conduction wire of high tension lead and ignition
coil core.
5. Keep pro
b
e (C) on cylinder fin (B). Remove
probe (D) from spark plug cap coil (A) and connect
it to ignition coil core to con
fi rm that the circuit is in
conducting state (closed circuit). If the circuit is not
in conducting state, ensure conduction between
ignition coil bolt and cylinder.
6. If the reading at step 3 or 4 is not in the range of
1.9 to 2.3 k
Ω , replace with a new ignition coil (Go
to “3-8 Replacing ignition coil”).
A
B
D
C