Zenoah SRTZ2500 Manuale Utente

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11. Troubleshooting guide
Case 1. Starting failure 
CHECK
PROBABLE CAUSES
ACTION
fuel tank
incorrect fuel
drain it and with correct fuel
fuel filter
fuel filter is clogged
clean
carburetor adjustment screw
out of normal range
adjust to normal range
sparking (no spark)
spark plug is fouled/wet
clean/dry
plug gap is incorrect
correct (GAP: 0.6~0.7mm)
spark plug
disconnected
retighten
Case 2. Engine starts but does not keep running/Hard re-starting.
CHECK
PROBABLE CAUSES
ACTION
fuel tank
➞ incorrect fuel or staled fuel ➞ drain it and with correct fuel
carburetor adjustment screw
➞ out of normal range
➞ adjust to normal range
muffler,cylinder (exhaust port)
➞ carbon is built-up
➞ wipe away
air cleaner
➞ clogged with dust
➞ wash
cylinder fin, fan cover
➞ clogged with dust
➞ clean
When your unit seems to need further service, please consult with our RedMax service shop in your area. 
10. Storage
• Aged fuel is one of major causes of engine
starting failure. Before storing the unit, empty the
fuel tank and run the engine until it uses all the
fuel left in the fuel line and the carburetor. Store
the unit indoor taking necessary measures for
rust prevention.
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