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6
Troubleshooting (Engine)
Problem
Probable cause
Remedy
Fail to start
Fail to push the fuel-injecting pump
Water mixed with fuel
Deterioration or carbon deposit of sparg plug
Back contact between spark plug and lead wire
Push continuously
Replace the fuel
Replace the plug
Check
It can start but cannot run at high speed
The choker is not on the full open position
Wrong ratio of fuel
Water in fuel
Open the full position
Replace
Replace the fuel
It can run but does not has enough efficiency
The filter of air cleaner is dirty
Outlet of cylinder and muffler have deposit of carbon
Piston, piston ring, cylinder have been worn seriously
Check and clean
Remove the carbon
Replace
Stops while running
Fuel used up
The lead wire of plug loose
Plug covered with carbon
The filter clogged
Water in fuel
The air hole in the tank lid clogged
Add fuel
Check and replace firmly
Replace the plug
Clean
Replace fuel
Clean
Problem
Probable cause
Remedy
Liquid cannot be out
Inlet valve and outlet valve blocked
Damage of washer
Damage of bearing
Dapage of piston
Replace or clean
Replace
Replace
Replace
Sprayer volume and pressure
Pressure not regulated enough
Elastic force of regulating spring not enough
Corrosion resistant steel ball worn
Pressure regulating valve seat worn
Regulate
Replace
Replace
Replace
Pressure is enough but spraying is not enough
Piston worn
Piston running distance not enough
Inlet valve and outlet valve worn
Spraying parts clogged
Replace
Replace
Replace
Clean
Spraying mist is not even
The holes of spraying sheet are worn
Spraying parts clogged
Replace
Clean
Stops while running
Fuel used up
The lead wire of plug loose
Plug covered with carbon
The filter clogged
Water in fuel
The air hole in the tank lid clogged
Add fuel
Check and replace firmly
Replace the plug
Clean
Replace fuel
Clean
Troubleshooting (Spraying)
