MAN048 ING
42
19 TROUBLESHOOTING
Below are some common faults, their probable causes and suggested remedy:
FAULTS
PROBABLE CAUSES
REMEDY
Starter will not crank when
turning the key to RUN position
Bad connections on starter cables. Check and tighten
Bad grounding
Check connections and tighten.
Interruption on fuse
Replace 5A strip fuse, after
checking for eventual reversal of
battery polarity.
Damaged cables
Replace
Battery connections loose
Check and tighten
Battery discharged
Recharge battery
Starter failure
Overhaul starter
Relay failure
Replace relay
Electronic box
Apply
to
Authorized
Service
Centers
Starter cranks but engine won’t
start when turning the key in
RUN position
Bad cable connections
Check connectors
Bad H.T. coil connection or coil
failure
Check/Replace
Bad H.T. coil grounding
Check grounding
Electronic box or ignition failure
Apply
to
Authorized
Service
Centers
Wet spark plug
Replace
Malfunction on induction system
Check status and connection on
fuel pipe
Replace gaskets and membranes
on carburetor
Check reed petals. Replace if
necessary
Engine starts but it stops after a
few seconds when turning the
key in RUN position
Bad cable connections
Check stator connector
Electronic box or starter failure
Apply
to
Authorized
Service
Centers
Bad
carburetor
adjustment
(
I
screw)
Check carburetor adjustment (see
sect. 5)
The starter cranks also after the
engine is running.
Electronic box failure
Apply
to
Authorized
Service
Centers
Rough idle
Bad carburetor adjustment
(
L
screw)
Check carburetor adjustment (see
sect. 5)
Drop in engine performance
Bad compression
Check piston
Bad carburetor adjustment
Check
carburetor
adjustement
(see sect. 5)
Insufficient gas flow
Check fuel flow lines and inlet filter
Dirty inlet silencer
Check and clean
Burning smell, smoke
Overheating of clutch
Check clutch (see sect. 11)
Clutch engages at too high RPM
Excessive wear of friction material Check clutch (see sect. 11)
Exhaust too noisy
Flexible damaged
Check and replace if necessary
Springs damaged or lost
Insulating strap damaged or lost
Damaged exhaust header