I have a 2000 Scag Turf Tiger. Three weeks ago, the belt that runs the hydro pump's broke. Because my dealer is not open on Saturday I got a replacement belt from N.A.P.A., manufactured by Gates. I installed it and it was working well for about three week and it broke. My question is; will a belt that I would buy from an auto part dealer be the correct type to work in the mowing environment? Or do I need to get the factory replacement belt for reliability? Or could I be having a bigger problem with my hydro pumps?