I've had this problem for years. I just got a new battery, which helps, but the first start of the day is difficult when the engine is cold. Once it's warmed up, it starts easily after that. Usually it will almost start. The next try it will only grind. I then have to give the throttle a few twists. I might have to do this 3-4 times, then it will start. Once it's warmed up there's no problem. Is this an automatic choke problem, or carburetor?