OEM Original Tecumseh air filter part # 31700 for the models listed below.
2 Pack Lug Bar Tire 480X4-8 Tiller Rototiller 4.80x4x8
2 Pack TIRE TUBE LAWN GARDEN TRACTOR 4.80 X 4.00 X 8 For Tiller
Air Filter & Pre Filter for Kohler K91 K141 K161 Tiller 230840S
Air Filter OEM Tecumseh 31700 Troy Bilt Tiller Rototiller H50 HH60 H70 HS50
Axle Tine Oil Seals for Troy Bilt Rear Tine Horse Tiller GW-9618099 921-04031