19
FAULT LOCATION
Fault
S ystem
O bservation
C ause
Ignition spark is present
Faulty fuel supply or com pression system , m echanical
N o ignition spark
STOP-sw itch operated, w iring fault or short circult, spark
plug or connector defective, ignition m odule faulty
Fuel supply
Fuel tank filled
Incorrect choke postion,carburetor defective, suction head
(gas line fittler)dirty, fuel supply line bent or interruped
Inside of engine
C ylinder bottom gaskel defective, crankshaft seals
dam aged, cylinder or piston rings defective
Outside of engine
Im proper sealing of spark plug
Starter not engaging
Broken starter spring, broken parts inside of the engine
W arm start
problem s
Tank filled
Ignition spark existiong
C arburetor contam inated, have it cleaned
Incorrect idling adjustm ent, suction head or carburetor
contam inated
Feul tank vent defective, fuel supply line interrupted, cable
or STOP-sw itch faulty
Insufficient
perform ance
Several
system s m ay
sim ultaneousl
y be affected
Engine idling
Air fittler contam inated, carburetor contam inated, m uffler
clogged, exhaust duct in the cylinder clogged
Engine stars but
dies im m ediately
Fuel supply
Tank filled
Ignition
system
C om pression
M echanical
faull
Engine not
starting or under
difficulties
