ORIGINAL: Gray Beard

It can be several things, tank location is the place I usually look at first, too high like Brr mentioned is usually the number one cause. If the plane has been flipped upside down or stood on it's nose can be another one. Like Jet mentioned, other then the first start of the day is pretty much the only time needed to choke. If you are using an electric starter you don't really need to choke anyway. OS four stroke engines used to come with a choke attached to the engine. OS figured most people today are using electric starters these days and no longer install them. You can also roll over the engine with your finger over the exhaust to choke, not as fast as using the carb but it works.