Generic TR 125 - Operation Instruments and Controls

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Fault Diagnosis
Start difficultly or start failed
Fault Diagnosis Adjustment Check Fault Cause
Oil supplying
for fuel injector
is enough and
smooth
No fuel
supplies to
fuel injector
Check if petrol
pump work well
There is
flashover in
spark plug.
Weak spark or no
spark is in spark
p
lug.
Disassemble spark plug
and put it into spark plug
cover; connect engine to
check whether there is
flashover in spark plug.
Compression
pressure is
normal
Compression
pressure is too
low or none.
Compression
pressure test
No Ignition
outbreak
phenomenon
of engine
With outbreak
phenomenon;
without start
Spark plug is
wet
Spark plug is
dry
Disassemble spark
plug to check again
No fuel in gasoline box
Pipeline block in fuel injector of gasoline box
Block in the pipeline of gasoline pump
Pipeline block in evaporation controlling
system of fuel tank
Block in the gasoline filter
Oil pressure of gasoline pump is not enough.
Unhealthy spark plug
Pollution of spark plug
Unhealthy CDI Group
Unhealthy trigger
Open circuit / short circuit of ignition coil
Open circuit or short circuit in ignition coil
Unhealthy master switch
Unhealthy charge coil
Unhealthy start clutch
Unhealthy cylinder plunger or packing ring
Air leakage of cylinder head gasket
Unhealthy automatic choke
Air in induction manifold
Incorrect ignition time
Bad adjustment of restriction adjustment
screw
Oil injection volume of fuel injector is over
Unhealthy automatic choke
Accelerator opens too much