Zenoah HEZ2500F FR - Manual (Page 24)

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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.