AGM 520 E - Troubleshooting Guide; Troubleshooting: Engine Wont Start; Troubleshooting: Poor Power Output

27
AGM
520 E (GB)
TROUBLESHOOTING GUIDE
1. ENGINE WILL NOT START
Symptoms
Likely cause
Solution
Normal
compressi
on
pressure in
the
cylinder
Normal
spark of
the spark
plug
Fuel system abnormality
No fuel in the tank
Add fuel in the tank
Fuel filter clogged
Clean the fuel filter
Normal
fuel
system
Fuel
Fuel is too dirty
Replace the fuel
Water present in the fuel
Replace the fuel
Too much fuel in the cylinder
Remove the spark plug and dry it
The wrong fuel mixture ratio
Make proper mixture
Normal
fuel
system
Normal
high-
voltage
cable of
the spark
plug
Spark
plug
Spark plug dirty with oil deposits
Clean oil deposits
Damaged insulation of the spark plug
Replace the spark plug
Clearance is too small or too big
Set spark plug clearance to 0.6-
0.7mm
High-voltage spark plug
cable abnormality
High-voltage spark plug cable cracked or
broken
Replace or tighten
Coil loose
Tighten
Fuel
system
normal
Normal
ignition
system
Inadequate compressive
stress
Piston ring worn out
Replace with a new one
Piston ring cracked
Replace with a new one
Piston ring stuck
Remove
Spark plug loose
Tighten
Leakage at the joint of the cylinder and
the carter
Remove
Normal compression
Poor contact at the connection of the
spark plug and the high-voltage cable
Tighten spark plug cap
The stop switch defective or there is a
short circuit
Repair or replace
2. POOR OUTPUT POWER
Symptoms
Likely cause
Solution
Shutting down on acceleration
Fuel filter clogged
Fuel is running out
Oil deposits in the exhaust pipe
Clean the fuel filter, clean the fuel lines
Adjust the carburetor
Clean oil deposits
Low compression
Piston, piston ring, cylinder worn out
Replace the piston, piston ring
Engine leaks
Leakage at the joint of the cylinder
and the carter
Repair
End of the crankshaft leaks
Poor sealing
Replace the seal
Engine overheating
Oil deposits in combustion chamber
Avoid continuous use, high speed and high loads.
Clean the oil deposits