Larry, Like Ray said, check the fuel filter. If you are new to the tractor, I would change it. It is located on the right side of the engine, I guess you could say it's mounted on the block. It is square and the whole thing will remove, clean around it will air or chem-tool to remove dirt and dust. Also check your air filter, I blow mine out and reuse them a few times. There is 2 filters inside that round cover under the dash. I can't recall if I have another fuel filter under the seat on my 450C. I know there is one under the seat on one of my 350C's or the 450C, but can't remember off hand what one. This is something I do every so often; under the seat there is a line that comes off the fuel tank and has a petcock and goes toward the back of the tractor, under the right compartment in the rear. It it a sediment drain for the tank, I use a clean glass bottle and drain fuel until I have nice clean fuel coming out. It is sort of a 2 person job. The reason I use a bottle is because I like to know what comes out of the tank. I am careful about keeping dirt and stuff out of the tank, so I dont get much out of the drain. Being in Calif. I don't have to deal with snow and ice, but I do know that mud can restrict your tracks a little. You may want to consider removing the rock guards if you find the dirt freezing in the rollers, this will help your problem. Good luck. Mark
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