Stens 525-265 Float Valve Kit Replaces Tecumseh 631021b, 631021, 631021A Fits models tecumseh v40, v50, v60, vm80, h30, vm100, hmsk, hssk,lev, lh, lv, oh195, ohh, ohm120 and ovrm120ayp 42" deck with double idler pulley, husqvarna lr12, lt1538, lt120, lth120, lth130, yth150 and yth180. For float carburetors When installing the rubber seat, install with the groove facing the carburetor Not compatible and warranty void with equipment using greater than 10-percent ethanol-blend fuel