NUTOOL AG2500HU, Original Operating Instruction

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• The engine and muffler will be very hot after the engine has
• Avoid touching the engine and muffler while they are still hot with
2. Clean the carbon deposits out of the muffler screen using a
Remember that spent oils, battery fluids and all the filters
of the machine MUST BE DISPOSED OF according to laws
on protection of the environment and current legislation, as
29
GB
6 - TROUBLE SHOOTING
ENGINE TROUBLE SHOOTING
CONDITION PROBABLE CAUSE
CORRECTIVE
ACTION
Loose spark plug
Tighten plug
properly
Insufficient
compression
Loose cylinder
head bolt
Tighten bolt
properly
Damaged gasket Replace gasket
Fuel
systems
problems
Insufficient
pulling speed
for starting rope
Pull rope
sharply
Engine
won’t start
No fuel
supplied to
combustion
chamber
Foreign matter
in fuel tank
Clean tank
Clogged
fuel line
Clean fuel line
Low engine
output
No fuel in tank Supply fuel
Fuel shutoff
not open
Open valve
Engine run
erratically
Electric
systems
problems
Spark plug dirty
with carbon
or wet with fuel
Remove carbon
or wipe up
spark plug
Sufficient
compression
Improper
spark
Damaged
spark plug
Replace
spark plug
Combustion
chamber
supplied
with fuel
Faulty
magneto
Improper
adjustment of
carburetor
Consult dealer
Improper
spark
Insufficient
pulling speed
for starting rope
Pull rope
sharply
Improper
grade
of fuel used
Check fuel
Overloading
Check
the working
condition
Overheating