The Snapper 1757802YP Lawn Mower Idler Arm Assembly supports proper belt tension and smooth operation in compatible lawn mowers. This replacement idler arm assembly is designed to hold and position the idler pulley within the mower's belt system. It works by maintaining appropriate belt tension as the pulley moves, helping ensure efficient power transfer between the engine and cutting... https://www.wholetoolbox.com/snapper-1757802yp-lawn-mower-idler-arm-assembly/1757802YP.html