Troubleshooting Guide - Zenoah GZ50N Owner's Manual

GZ50N

9. Troubleshooting guide

Case 1. Starting failure
CHECK
fuel tank
fuel filter
carburetor adjustment screw
sparking (no spark)
spark plug
Case 2. Engine starts but does not keep running/hard re-starting
CHECK
fuel tank
carburetor adjustment screw
muffler, cylinder (exhaust port) → carbon is built-up
air cleaner
cylinder fin, fan cover
When your unit seems to need further service, please consult with our ZENOAH service shop in your area.
GB-8
PROBABLE CAUSES
→ incorrect fuel
→ fuel filter is clogged
→ out of normal range
→ spark plug is fouled/wet
→ plug gap is incorrect
→ disconnected
PROBABLE CAUSES
→ incorrect fuel or staled fuel → drain it and use correct fuel
→ out of normal range
→ clogged with dust
→ clogged with dust
ACTION
→ drain it and use correct fuel
→ clean
→ adjust to normal range
→ clean/dry
→ correct (GAP: 0.6 ~ 0.7 mm)
→ retighten
ACTION
→ adjust to normal range
→ wipe away
→ wash
→ clean