Seems like you need to lean out the low speed or the idle needle just a tad bit. If it stutters before going to full throttle, it's because there is fuel loading up in the engine (too rich). It does this on taxi because it's in the idle state longer. The more it loads up on fuel, the more chances of it shutting down when you do full throttle. Also known as you having a poor transition from idle to full. A well tuned engine should be able to idle for extended time and then shoot up to full throttle without any choking or hesitation.

I usually don't touch the Idle until i have a gallon through the engine, but if it's really bad... just 1/8 or 1/16 turn and lean the idle valve (please refer to your instructions manual to locate this )