Ron Torsch Farm Equipment BK371V Fits John Deere 4010 4020 USX-20 Carburetor Repair Kit USX-20 MSCK31 Basic carburetor repair kit contain needle float valve, throttle shaft, float lever shaft and gasket set. This is for most John Deere 4010 and 4020 tractors. For use with Marvel-Schebler USX-20 carburetors. Replaces OEM AR10110R and AR34244R. These are in stock at our store and ready to ship. Please look in our store to find other items you might need and save on shipping costs. We can combine shipping charges for most items we sell. Used parts are sold as is unless specified otherwise. All of our items are also available for local pickup at our place of business, 2452 King Settlement Rd, Alpena, MI 49707. We reserve the right to change shipping carrier depending on current rates without notice. If you need a specific carrier please let us know at the time of sale.