Troubleshooting Guide - Yamabiko ECHO SRM-420ES Service Manual

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8-2 Troubleshooting guide

TROUBLE
Engine does not crank.
Engine does not start.
Fuel leaks.
Idling is not stable.
Acceleration is poor.
Engine stalls at high speed.
Engine lacks power.
Engine overheats.
Engine misfires.
Engine / others are extremely noisy.
Fuel consumption is excessive.
Vibration is excessive.
Engine does not stop.
Nylon cord head does not rotate.
Nylon cord head does not cut well.
CHECKING
Starter system
Rewind spring
Starter drum / rope
Starter pawl / spring
Ignition system
Sparks
Spark plug
Spark plug cap / coil
Ignition switch
Ignition coil
Pole shoe air gaps
Flywheel
Flywheel key
MAINTENANCE GUIDE
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
REFERENCES
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
2-3
2-1, 2-2, 2-4
2-5
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01
3-2
3-3
3-7
3-4, 3-5
3-6, 3-8
3-9
3-10
3-10
SRM-420ES, SRM-420TES
T410S, B410S
T410TS, B410TS
Check
(Continued)
first.