Loosen oil
drain
screw
at
the bottom
of
Carburetor
.No
oil
shedding.
needle valve block
clean
or
replace
carburetor
normal oil
supply but
poor
compressi
on
piston ring abrasion,
loose spark plug
replace
Air leak of cylinder
head
screw tigh
wrong
air
valve
clearance or timing
clean, readjust and
reassemble
normal
ignition
and
oil
supply
poor contact of high
voltage cable and
spark plug
replace and connect
Failure
of
stop
switch , short circuit
clean
breakdown of oil alert replace
(2) Abnormal conditions in the movement
Breakdown
phenomenon
Cause
Solution
Insufficient power
，
Low rotation
damper closed, poor
ventilation of muffler
open
damper,
replace muffler
moving parts abrasion
check, replace
speed
adjustment
mechanism failed to
reach
the
best
equilibrium
adjust
speed
adjustment
mechanism
low ignition power
replace ignitor or
flywheel
excessive clearance of
air valve
regulate
to the
required scope
carbon deposition
Clear away carbon
excessive
fluctuation of speed
speed
adjustment
mechanism failed to
reach
the
most
optimized combination
adjust
speed
adjustment
mechanism
