19
N
Y
N
Y
Y
N
Y
N
Failure Diagnosis
Diagnosis on failure or difficulty in starting engine
Failure or difficulty in starting engine
Check ignition system
Remove the spark plug and check whether there is
carbon fouling between electrode.
Sparkover test for spark plug
Eliminate carbon fouling
Weak spark or no spark between electrode
Large blue or bluish purple spark between electrode
Screw off spark plug cap and conduct
sparkover test for high-voltage line
Check whether ignition is timely conducted with
an ignition timing lamp
Large blue spark
Weak spark or no spark
Check whether spark plug and cap are in
good condition
Check power
supply for
ignition
Check whether
short circuit or
open circuit
occurs to
ignition coil
Check whether
short circuit or
open circuit occurs
inside the ignition
system
Check whether
CDI ignition
device is in
good condition
Check the compression
pressure of cylinder with
pressure gauge
Check
whether there
is gasoline in
the fuel tank
Normal
compression
pressure
Insufficient
compression
pressure
Add
gasoline
Non-contact ignition system
for electromagnetic motor
1.
Check whether short
circuit or open circuit
occurs to ignition coil
2.
Check whether short
circuit or open circuit
occurs to trigger coil
1.
Check whether CDI
ignition device is in
good condition
2.
Check whether
flywheels and trigger
coil are loosened
Loosen drain
screws of the
carburetor and
check whether there
is gasoline in the
overflow pipe
