A device for firing the explosive mixture in an internal combustion engine.
More example sentences
- Then, without the spark plug in place, pull the starter cord slowly, distributing the oil through the cylinder.
- Sedlack first tried to disable a snowmobile by pulling out a spark plug.
- He looked over at the battery and saw that the cap on a spark plug was loose.
Definition of spark plug in:
- The British & World English dictionary