Re: How do you treat your air cleaner's pre-filter?
My JD X500, with the Kowasaki twin uses a thin foam pre-filter. I just wash and dry as others have already stated and reinstall, no oil. My air filter is just blown clean with compressed air. Both are still near new condition at 185 hours. I don't have much dust other than the occasional mower deck blow back during turns or on windy days. But, fall leaf cleaning with the Cyclone Rake and June Poplar fuzz requires frequent checking and cleaning of all intake and cooling functions, including my transmission fan blades.
Have a great and safe Independence Day 4th of July! Also, give a thanks to our military, who have preserved our liberty.
X 500 48" Deck 48" blade
Stihl BR 600
Sears Suburban Super 12 1968
Craftsman 1990 something LG Tractor 46" deck
Original Kohler 8hp Giant Vac early 1960s