I think thats probably the most likely story.
My guess is someone either repaired or changed the switch at some point, and maybe lost or broke the switch plate, and decided the grommet would be a good idea
Maybe to keep the switch noise from being audible by vibrating the top?no, i think it's stock. my 175 has the toggle mounted in a rubber grommet and it's original, circa 1970. i've seen tons of them like that.
Maybe to keep the switch noise from being audible by vibrating the top?