KAYO MOTOR A180, Service Manual

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1.Preparation of information, fault diagnosis
‐
Unable to speed up, weak
Inspection/Adjustment
Failure situation Possible causes of failure
Slowly rotate the
throttle and observe the
engine rotation
Engine speed can be
increased Engine speed cannot
be increased
Check ignition time
(using ignition timing lamp)
Ignition time is correct
Incorrect ignition time
Check cylinder
compression pressure (use
cylinder pressure gauge)
Compression pressure
is normal
Insufficient
compression pressure
Check if the carburetor
nozzle is blocked
No blocking Obstructed
Remove the spark plug
and check
No stain or discoloration
and check
Serious stain and
discoloration
Check if the engine is overheated
No overheating
Overheating
Speed up
No knock phenomenon Knock phenomenon
1. The air filter is blocked
2. Poor gasoline fuel supply
3. The pipeline of the fuel tank evaporation
control system is blocked
4. The exhaust pipe muffler is blocked
1. C.D.I. group is defective
2. A.C. Generator is defective
1. Excessive wear of cylinder and piston ring
2. Cylinder gasket deflated
3. There are sand holes in the compression
part
1. Remove foreign objects
1. Remove dirt
1. Piston and cylinder wear
2. The mixture is too thin
3. Poor gasoline quality
1. Carbon deposits in the combustion chamber
2. The mixture is too thin
3. Poor gasoline quality