KAYO MOTOR A180, Service Manual

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1.Preparation of information, fault diagnosis
1. Defective automatic side starter
1. Defective spark plug
2. The spark plug is fouled
3. C.D.I. Bad group
4. Bad generator
5. The ignition coil is open or short-circuited
1. The piston ring is stuck
2. Poor deterioration of the valve
3. Cylinder and piston ring wear alone
4. Cylinder gasket deflated
1. Poor throttle operation
2. No air is sucked in by the intake pipe
1. The carburetor mixture is too thick
2. Poor throttle operation
1. Whether there is gasoline in the gasoline tank
2. Check whether the oil pipes supplying the
carburetor, the negative pressure pipe of the intake pipe
and the gasoline pipe are blocked.
3. Carburetor float valve is blocked.
4. Pipeline of fuel tank evaporation system is blocked.
Fault diagnosis
The engine cannot be started or is difficult to start
Possible causes of failure
Loosen the drain screw to
check if there is gasoline
inside the carburetor
Inspection/Adjustment
Failure situation
Carburettor with
gasoline supply
No gasoline supply
carburetor
Ground the spark plug with
the engine and check whether
the spark plug is igniting
The spark plug has
sparks
The spark plug has
weak sparks, no sparks
Measure cylinder
compression pressure
Compression pressure is
normal
Insufficient or no
compression pressure
Start the engine according
to the essentials
No ignition burst
Ignition phenomenon
but unable to start
Remove the spark plug
and check
Spark plug dry
Spark plug oil wet
After the engine has cooled for 30
minutes, remove the carburetor,
connect a hose, and blow air into
the fuel increase circuit
Blow-through Blowing obstruction