What are the symptoms of a faulty scooter electronic choke?
1 Answers
If the electronic choke of a scooter's carburetor malfunctions and fails to operate, it can result in the engine starting normally when cold; however, after the engine warms up, the choke's inability to properly close the auxiliary starting fuel passage will cause the engine to jerk during operation and emit black smoke from the exhaust pipe. This ultimately leads to flooding the spark plug, causing the engine to stall, and making it impossible to start the engine when hot. Working principle of the electronic choke: When the motorcycle engine is running, the current generated by the magneto is directed through an additional lead wire to the PTC heating element inside the choke. This generates heat, causing the wax thermal expansion body to expand. The expansion then pushes a small piston downward via a diaphragm and liquid medium, which in turn moves the vertically sliding fuel control needle valve downward to close the enrichment fuel outlet.