I've been running a 23hp Vanguard in my 4223 for 7 years and still on the same belts for both the snow caster and mowing deck. I overdrive both the deck and caster with modified drives. I feel my other tractor with an 18hp Onan actually puts out more potentially belt-breaking torque. This is more a from-the-seat observation from operating them over the years.If it's an actual 23hp, blowing snow the engine power will not be the limiting factor for long. Putting that much torque through a single b section belt will however. The belt drive is pretty much maxed out with stock hp, so much so that belt life is severely curtailed as is.