EN
PETROL BRUSH CUTTER
USER'S MANUAL
27
Trouble shooting guide
2. LOW OUTPUT
symptom
probable cause
remedy
fl ameout when speedup
the smoke is thin, carburetor spout
backward
fuel fi lter obstruct, fall short of fuel
muffl er fouled with oily deposit
clean fuel fi lter, clean fuel road
adjust carburetor
clean the oily deposits
compress press is inadequate
Piston, piston ring, cylinder attrite,
replace piston. piston ring
engine leak
conjoint surface of the cylinder and
crank cass leak
repair
the end of two crank shaft leak
the seal is bad
replace seal
others
engine overheats
burning room fouled with oily
deposits
avoid use it for long time, high
speed and heavy load
clean the oily deposits
3. ENGINE RUNNING UNSTABLE
symptom
probable cause
remedy
there are knock sound in engine
piston, piston ring, cylinder attrite,
piston pin, piston attrite
bearing of crank shaft attrite
replace piston, piston ring
replace piston pin, piston
replace bearing
there are metal knock sound
engine overheats
burning room fouled with oily
deposits
gasoline branded is unfi t
avoid use it for long time, high
speed and heavy load
clean the oily deposits
replace with required branded
octane
engine ignition break off
there is water in fuel
spark gap is wrong
coil gap is wrong
instead fuel
adjust spark gap 0.6-0.7mm
adjust coil gap 0.3-0.4mm
4. THE ENGINE SUDDENLY STOPPED
probable cause
remedy
fuel has been used up
add fuel
spark plug fouled with oily deposits and short circuit
clean the oily deposits
high voltage wire fall off
connect