Ignition Coil Magneto (for 40cc 4-stroke engines) 4stroke Typical symptoms that indicate a

Typical symptoms that indicate a bad coil:

One of the most popular diaphragm carburetors

and there is no spark

You disconnected the kill switch to eliminate the possibility of a jammed kill switch button

or gear box for 40cc 4-stroke motors

Ignition Coil Magneto (for 40cc 4-stroke engines) 4stroke Typical symptoms that indicate a2 shoe engine clutch for 40cc 4 stroke motors. Typical symptoms that indicate a bad coil: The bike is not starting at all. You took out the spark plug and checked for spark (properly grounding it while pulling), and there is no spark. You disconnected the kill switch to eliminate the possibility of a jammed kill switch button, and there is still no spark.