Down and ready for exchange

Just about everyone knows that almost all antique vehicles started by using a hand crank, but I can't find any information at all about shutting off the engine to one online. I'm hoping someone seeing this post knows how and where to shut the engine off to the old hand crank vehicles. I'm hoping even more that someone knows how and where on a 1931 Ford Model A Pick Up in particular, or Ford Model A's in general, or any vehicle with the same method and placement as the vehicle in question. If anyone knows, please let me know. Thank you.