STIHL 020 T - Arbtalk
STIHL 020 T - Arbtalk
STIHL 020 T - Arbtalk
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2.3 Ignition System<br />
Warning: Exercise extreme caution while carrying out maintenance and repair work on the ignition system.<br />
The high voltages which occur can cause serious or fatal accidents!<br />
Spark plug terminal firmly seated on spark plug?<br />
yes<br />
no<br />
Remove spark plug.<br />
Is it in good condition?<br />
yes<br />
Press terminal firmly onto spark<br />
plug and fit spring if necessary.<br />
no<br />
Clean spark plug and reset electrode gap.<br />
Does spark test produce powerful spark?<br />
no<br />
Faulty insulation on ignition<br />
lead or short circuit wire?<br />
yes<br />
no<br />
Replace faulty ignition lead of short<br />
circuit wire. Repair contact spring.<br />
Insert screwdriver in place of spark plug in spark plug<br />
terminal and hold about 4 mm (1/8") away from<br />
ground. Sparkover?<br />
no<br />
yes<br />
Is air gap correct?<br />
yes<br />
Fit new spark plug.<br />
no<br />
Adjust air gap (0.25 mm/0.010 in).<br />
Is spark test positive?<br />
Does flywheel appear to<br />
be in good condition?<br />
no<br />
yes<br />
no<br />
Use ohmmeter to check ignition lead<br />
for break. If break is detected, replace<br />
ignition lead. Does spark test now<br />
produce sparkover?<br />
no<br />
Fit new flywheel.<br />
Is spark test positive?<br />
no<br />
Replace ignition module. Does engine<br />
now run after positive spark test?<br />
no<br />
Ignition system in order.<br />
Look for fault in fuel system and<br />
carburetor.<br />
<strong>STIHL</strong> <strong>020</strong> T 8
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