Tecumseh 590409A Screw Hardened Steel

The Tecumseh 590409A Screw is a genuine OEM replacement fastener designed to securely fasten recoil starter components and related engine assemblies in Tecumseh small engines. It is commonly installed in Tecumseh-powered lawn mowers, snow blowers, tillers, generators, cultivators, and chainsaws, and other outdoor power equipment that use compatible Tecumseh engines. This screw is made of hardened steel with a corrosion-resistant zinc-plated finish and is intended for OEM use in recoil starter assemblies and associated engine components (installation location is dependent on the specific machine). The 590409A supersedes the earlier 590409 and replaces that part number in applicable starter assemblies, with a torque specification of 45–50 in-lb when replacing 590409 with 590409A. Compatible equipment includes lawn mowers, snow blowers, tillers, cultivators, generators, and chainsaws, among other outdoor power equipment, and compatible brands include Tecumseh, Craftsman, Toro, Briggs & Stratton (selected models), Lauson, Eska, and Preway (model dependent). Common replacements listed for context include 590409, 650815, and 650856.