My 2-up machine has a carb., and I've been on the F.I. machines. (I have a Bombardier Traxter Max) If I had my choices, I would NOT go with a carb. for the usage that I get from mine. Cold blooded is 110% correct. I can't fire it up and just putt around. When I stop, it dies unless I pull out on the choke. Then, because the idle is higher, I can't shift from N to D without pushing the choke off.
A friend has a machine that is belt driven. He has burned thru a couple of belts planting his food plots. Mine is shaft driven, and I haven't had any problems.
One thing that concerns me about mine, is that the engine oil also lubricates the transmission......... I've never seen that before. But, I guess that if I keep the oil changed, then there shouldn't be any problems. The other downside is that the closest dealer is in Mi., a good 45 miles one way. (for oil and filters)