On 13/12/2017 13:41, AnthonyL wrote:

We used to take the spark plugs out of the Austin 12 and put them in
the oven or over the gas hob though in retrospect I'm not sure what
good it actually did.

Take the plugs out, tip a bit of petrol in each hole, throw a match in
each one, wait for for roar bang, do the next one.

Bill