IIRC the engine is rated at 17 hp.
www.tractordata.com
With the hydrostatic drive, the snow feed rate is easily controlled. With the two speed pto set to high, the fan is spinning at pretty good clip. The combination has been very satisfactory for the past two years since I put it together.
When we get one of those big wet dumps, I break out the Fordson E27n with the Western 7 ft. angle push blade. ;-)