Briggs & Stratton Starter Motor Drive Kit (Roll Pin Type). There were 2 different versions, if you have a clip retaining type see 6398.
Starter Motor Drive Kit Fits Briggs And Stratton 495877
WheatThrive Starter Motor Drive Kit, Lawnmower Parts, 16-Tooth Gear, Easy Install, for 190400-422499, Replaces 696541
Starter Motor Drive Kit Fits BRIGGS & STRATTON 495878 696540
Starter Motor Drive Kit Fits BRIGG & STRATTON New Type 696541, 497606
