The O Ring(d:3.1,id:24.4) is the lowest priced item on this Starting Motor (model Y/k1) schematic.
The eleven Lt-f160 Quad Runner 1998 (w) Usa (e03) Quadrunner Quad-runner Starting Motor (model Y/k1) component parts are all listed in this schematic.
A sample from the products for the Starting Motor (model Y/k1) include: Brush Holder Set, Spring,brush, Nut, O Ring.