All I did was to screw the spark plug in a bit tighter, and shut the pet-cock.
It had been broken off close to the battery box and the spark plug.
The spark plug S is located in the head, close to the inlet port.
Nat Trevor, if you dare to pun, I'll—I'll—bust your spark plug.
It might prove hard to get such a commodity as a spark plug in Millbrook.
B is the battery ...