Zenoah GZ50N - Manual (Page 8)

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.