Time for the snow blower; I'm running a B7200HST with a 2 speed mid PTO driving a B2551 snow blower. My PTO is rated at 1546 and 2455 with engine RPM of 2500. My question is, what speed do you operate the mid PTO, high or low. The reduction on the input ahead of the reducer is 40:1. With that the impeller is about 60 rpm On high, it just seems so fast for the drive shaft. She is an old girl!!!