I'm with QNH 1013 on this. The prop almost certainly won't stop, so if you pull the mixture to ICO in flight the engine is still turning, and the mags are still sparking the plugs. All that's missing is the correct mixture - so if you calmly return the mixture to fully rich the engine WILL burst back into life. There should be no need to crank it - and you probably shouldn't even need to switch the fuel pump on. If it doesn't come back to life there's something wrong with the engine.
Surely the mixture control must be usable on your aircraft? You don't mention whether it's on a C-of-A or not, but I'd be amazed if any aircraft would get through an annual with an u/s mixture control.