Welcome to I boats. My experience is that it is somewhat normal for the need to warm for ~5 minutes (maybe not 10). Did you have it in "throttle only"? Throttle only at about 1000 RPM for 3-5 minutes should be good to back on out. What's wrong with the choke? Not sure about play in the shifter.keeps stalling until itwarms up for 5 to10 minutes carb has electronic choke also have problem with play in shifter could this be part of problem