My BX2200 has 170 hours and is 3 years old and I have not changed the fuel filters. I have done all other maint to the "T", and even have the filters, but just haven't done it. The tractor is stored inside. Seems like a waste to change them too often, may even be worse. From what I have been reading on this board they seem to collect moisture and that is why many have changed them. I can't image that they are that dirty. I was thinking of changing them at 200 hours. What are others doing??