HER CHEE GTC-50, Service Manual

Page: 12 / 86

ADLY
MOTO
1-9
DIAGNOSIS OF BREAKDOWN
Start-up difficult or can not start
This content is the explanation of diagnosis of the engine‘s breakdown, please see each content for
reference of the breakdown diagnosis not mentioned here.
Loose carburetor cup screw and check if
the fuel arrive carburetor no fuel

Fuel tank has no fuel

Blocking of fuel tube
Fuel

Blocking of float valve

Blocking air of fuel tank cap

Blocking of fuel filter
Remove spark plug, put into the cap, and
connect the spark plug to ground (negative),
check the spark condition.
Spark weak or
no spark

Spark plug defect or dirty

CDI defect

ACG defect
spark strong

Short circuit of H.T. coil

Ignition wire broken or short

Main switch defect
Check compression pressure
Weak or no

Piston ring too weak

Reed valve defect
pressure is good

Cylinder and piston ring wear out

Leaking of cylinder gasket

L/R crankcase leaking
Start-up engine base on the instruction
Igniting but no
start

Bad adjustment of idle screw

Air leaking from intake manifold

Bad ignition timing
without exploration

Remove spark plug and check again
Wet

Over flow in carburetor

Throttle valve opened too much
spark plug is dry

Wait for 30 min. and remove carburetor,
connect tube to fuel-adding path and blow can not pass

Starter plunge defect