Its not very PC these days but....
If you make sure you over head the runway at about 4-5k pull the mixture then stall the aircraft. Keep it in the stall and really crank it back and don't let it spin. Eventually the prop will wind down and stop turning all together. It is now stalled and everything is very quiet. As soon as it stops pitch for best glide speed
Select fully rich and normal restart in the air drills (aka engine failure restart) and crank it. If it dosn't start don't muck about trying to start it, set up for a glide landing and then try again. if it still dosn't start do a forced landing on the runway and be prepared for a major bollocking off the CFI and airport manager.
They used to do it days gone by supposedly because you have a better glide range but as you generally loose more height and range by stalling the prop than you extend the range after stalling. It has been decided by those that know as dangerous and a bit stupid.
tescoapp