Dieseling - the ignition can be off

"Dieseling or engine run-on is a condition which can occur in spark plug, gasoline powered internal combustion engines whereby the engine keeps running for a short period after being turned off, due to fuel igniting without a spark."

This condition can occur for a multitude of reasons:

- Built-up carbon in the ignition chamber . , ,

- A carburetor that does not close entirely . . .

- Incorrect timing.

- An engine that runs too hot or too lean . . .

- An idle speed that is too fast . . .