Hi Scott,
My Scag Tiger Cub has a collection system and the bags hang close to the engine air inlet. I recently repowered this machine with a Briggs Professional Turf series engine, but with the original Briggs engine I sometimes would have to change the airfilter every 12-15 hours. I bought the filters by the case on line and have done the same for the new engine. Fortunately the new engine has a more effective air filtration system, so I'm changing filters every 40-50 hours.
I generally put 100-125 hours annually on the Scag.
My Hustler is a rear discharge machine and the air filters stay much cleaner, but the machine gets dusty in cemetery use and no electricity at the cemetery. I clean it with my Stihl backpack blower.
Mad Mackie in CT:laughing::biggrin::smile: