GB-8
GZ50N
9. Troubleshooting guide
Case 1. Starting failure
CHECK
PROBABLE CAUSES
ACTION
fuel tank
→
incorrect fuel
→
drain it and use 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 ~ 0.7 mm)
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 use 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 ZENOAH service shop in your area.
