TRBL
SHTG
Troubleshooting
9-3
62Y5A11
Symptom: Engine cranks, but will not start.
• Check the ignition system.
• Check the fuel system.
• Check the compression pressure of power unit.
Wet spark
plugs?
Does the
engine start?
Wet spark
plugs?
Out of specifi-
cation?
Out of specifi-
cation?
Check the condition of the spark
plugs.
Check the fuel system.
Failure in starting operation
Failure in starting operation
Check the fuel system.
Check the condition of the spark
plugs again.
Check the compression pres-
sure of the combustion chamber.
Check the ignition system
output peak voltage.
Check the valve
clearance.
WARNING
• Do not touch any of the
connections of the spark
gap tester leads.
• Do not let sparks leak out
of the removed spark
plug caps.
• Keep flammable gas or
liquids away, since this
test can produce sparks.
Start the engine using dried or
new spark plugs.
Adjust the valve
clearance.
No
No
No
Yes
Yes
Yes
Yes
No
Yes
No
No
Check the ignition spark using the spark gap tester.
Below the
spark gap
specification?
Yes
Check the cylinder head, cylin-
der body, and piston assembly.
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