For cold starts, I use 1/2 to full choke initially -- be sure that the throttle is FULLY CLOSED. As soon as the engine fires, I feed in a bit of throttle and start easing the choke off. For warm/hot starts, I use no choke at all and just crack the throttle open. These procedures work very well for my RV-12 and others I have flown -- usually, you can't even see the prop move before its running.
I tried the suggestion above and it works, both hot and cold (Phoenix is relative cold) Thanks for the suggestion. Mark