20
a
c
b
Poor
Fair
Check engine
pistons,
bearings and
others
Replace the
original
starting motor
or repair it.
Check spark plug for cleanliness,
normal gap, pollution by gasoline. If
yes, check the choke of the
carburetor
Fair
Poor
Clean and adjust
spark plug gap or
replace with new
ones
Poor
Fair
Refer to
1-8-2 Poor
skip in
Spark
Plugs for
checking
Check if the
adjustment
screws of the
carburetor need to
be regulated
Poor
Fair
Test the
compression
Clean or replace the slow
nozzle or correct, replace
with new threshold
Check choke of
the carburetor
for troubles
Readjustment
Poor
Fair
Adjust or
replace new
choke parts
Check if the slop
nozzle of the
carburetor is
obstructed or the
threshold fails
Poor
Fair
Check air filter grill
for obstruction
Check cylinder washer for leakage,
check cylinder, piston, piston ring
for wear, with correction,
adjustment or replacement
Poor
skip
Fair
skip
Poor
Fair
Clean
ventilation
tubing
Adjustment or
replacement of
carburetor buoyant
needle valve
