Malaguti CIAK 125 Service Manual page 319

TROUBLESHOOTING TROUBLESHOOTING
TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING
THE ENGINE DOES NOT START OR IT IS DIFFICULT TO START THE ENGINE DOES NOT START OR IT IS DIFFICULT TO START THE ENGINE DOES NOT START OR IT IS DIFFICULT TO START THE ENGINE DOES NOT START OR IT IS DIFFICULT TO START THE ENGINE DOES NOT START OR IT IS DIFFICULT TO START
Check/adjustment
Loose the drain screw to check
whether the fuel reaches the
carburator
Remove the spark plug and
check it again
Check cylinder compression
Start the engine as usual
Remove the spark plug and
check it again
Problem
The engine reaches the
carburator
The plug sparks
Normal compression
The engine does not start
Dry spark plug
The engine does not reach
the carburator
Weak spark or no spark
at all
Weak or no compression
at al
Correct ignition but the
engine does not start
Wet spark plug
162 09/02
Possible cause
Empty fuel tank.
1
Clogged fuel
2
intake pipe.
Clogged automatic starter fuel valve.
3
Clogged oil gallery.
4
Fuel cap suction hole.
5
Clogged fuel filter.
6
Clogged filter holder.
7
Fuel pump irregular operation.
8
Spark plug irregular operation.
1
Damaged spark plug.
2
CDI unit irregular operation.
3
AC generator irregular operation.
4
Ignition coil short circuit or failure.
5
Excitation coil short circuit
6
or failure.
Starter button irregular operation.
7
The starter motor is idling
1
but the crankshaft
does not rotate.
Small valve opening.
2
Incorrect valve running
3
along the seat.
4
Worn piston rings and
5
compression rings.
Burst cylinder upper gasket.
6
Defective cylinder head.
7
Starter button irregular operation.
8
Automatic starter irregular operation.
1
2 Air suction pipe irregular operation.
Wrong ignition time.
3
Incorrect adjustment of the main screw.
4
Flooded carburator.
1
Automatic starter irregular operation.
2
3 Throttle too open.