GENUINE Blur 150, Service Manual

Page: 91 / 186

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(B) Troubleshooting
Difficult to start
1.No sparking in spark plug.
2.Compression pressure too low.
3.No fuel in the carburetor
-air cleaner blocked
-oil pipe blocked
-bad adjustment of the fuel level
float valve is jell
Mixed air too dilute
1.Main jet blocked
2.Float valve blocked
3.Fuel level too low
4.Fuel system blocked
5.Second air sucked into intake system
6.Bat vacuums during piston movement
7.Throttle valve malfunction
Too much fuel in the engine
1.Air cleaner blocked
2.Mixed air is too dilute in the idle system
Sparking unsteady while increasing speed
1.Ignition system malfunction.
2.Air mixture is too dilute
Difficult to start, Ignition off, Unstable idling
1.Fuel system blocked
2.Ignition system malfunction
3.Air mixture is too dilute or too thick
4.Fuel deterioration
5.Second air sucked into intake system.
6.Bad idle adjustment
7.Bad fuel volume adjustment
8.Idle system or fueling system blocked
9.Bad adjustment of fuel level
Mixture air too thick
1.Auto chock system malfunction
2.Float valve malfunction
3.Fuel level is too high
4.Air route blocked
5.Dirty air cleaner
6.Fuel overwhelming in carburetor