15TS 500i
3.5 Troubleshooting chart STIHL Injection
Diagnosis
OK?
no
– Carry out diagnosis
with STIHL MDG 1
Repair fault shown by STIHL MDG 1
Decompression valve
leaking, faulty
yes
Oil seals
defective
Crankcase leaking,
faulty
– Check starting
behavior
Check decompression
valve, replace if necessary,
b 6.10
Check oil seals, replace
if necessary, b 6.2,
b 6.3
Check engine does not
leak, b 6.2
Complaint
remedied?
no
Starting
behavior OK?
no
yes
Trouble-
shooting
completed
yes
Too much starting effort
Decompression valve
leaking, faulty
Spark plug defective
Break or damaged
insulation in ignition lead
Check decompression
valve, replace if
necessary, b 6.10
Replace spark plug
Check ignition lead, replace
if necessary, b 7.4
Engine does not start
2
1
3