Malfunction | Manifestation and possible causes | Remedy |
Problems starting the engine. | 1. The idle speed jet is clogged. | Clear. |
2. The idle speed pipe is clogged. | Clear. | |
3. Air leakage from carburetor connections. | Tighten and replace gaskets. | |
4. The plunger is not working properly. | Adjust. | |
Problems at idle or low speed. | 1. The idle speed jet or the idle speed air jet is clogged or weakened. | Clear. |
2. The outlet of the idle fuel mixture is clogged. | Clear. | |
3. The plunger is not completely closed. | Adjust. | |
Problems at medium or speed. | 1. The main jet or main air jet is clogged. | Clear. |
2. The fuel mixture nozzle is clogged. | Clear. | |
3. The throttle valve is not working properly. | Check the work. | |
4. Fuel filter is clogged. | Clear. | |
Excessive amount of fuel or uneven supply of fuel. | 1. Worn or damaged needle valve. | Replace. |
2. The spring in the needle valve is broken. | Replace. | |
3. The float is not working properly. | Adjust. | |
4. The needle valve is clogged with foreign material. | Clear. | |
5. High or low fuel level. | Adjust the height of the float. |