1957 American LaFrance
Shop manual terms and translations from the October 2002 PPPSI newsletter:
The manual says: Turning the engine will be easier with the spark plugs removed.
Translation: However, starting the engine afterwards will be much harder. Once that sinking pit of your stomach feeling has subsided, you can start to feel deeply ashamed as you gingerly refit the spark plugs.
Updated: January 2003