18
stop switch failure or short
circuit
repair or replace
2.
LOW OUTPUT
symptom probable
cause remedy
fuel filter obstruct,
clean fuel filter
、
clean fuel road
、
fall short of fuel
adjust carburetor
flameout when speedup
the smoke is thin
carburetor spout backward
muffler fouled with oily deposits
clean the oily deposits
compress press is shortage
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
engine overheats
avoid use it for long time
、
high speed and heavy load
burning room fouled with oily
deposits
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
engine overheats burning room
fouled with oily deposits
avoid use it for long time
、
high speed and heavy load,
clean the oily deposits
there are metal knock sound
gasoline branded is unfit
replace require branded octane
there is water in fuel
instead fuel
spark gap is wrong
adjust spark gap 0.6-0.7mm
engine ignition break off
coil gap is wrong
adjust coil gap 0.3-0.4mm
