I have an exmark turftracer hp and when I mow in just slightly tall grass it bogs down like crazy. Blades almost stop completly. The mower is only a year old or so and I havn't changed any belts on it yet. Do you think its the belt. I don't even think its worn but I don't know what to look for either. I know the engine should be able to handle this stuff its really nothing for the mower.