2 Sets Carburetor Carb Starter Choke Plunger Kits Fit For - TM36 TM40 HS40 HSR Choke Nut Spring Guide 640-12001 This replacement kit is designed for use with carburetor systems on models including TM36, TM40, HS40, and HSR series.Each set includes components such as rubber, brass, and plastic parts necessary for choke plunger function.The kit contains 2 sets of carburetor choke starter assemblies, each consisting of plunger, spring, nut, and guide components compatible with 640-12001.Constructed according to factory specifications, the kit ensures proper fit and function for carburetors requiring this configuration.Installation is straightforward and allows for choke , contributing to improved starting performance and throttle response.Designed specifically for compatibility with HSR and TM series carburetors, this set supports efficient engine startup and consistent.