I replaced mine when I restored my 140. The new switch is bigger in diameter. it came with instructions for retrofitting on the old bracket. The down side of the new switch is that the button protrudes out further and would not allow the lever to return to neutral if you press the pedal down. I have the switch adjusted as far back as possible and still work. If I had it to do over I would just clean the old switch and reinstall it. I kept my old switch and just haven't gotten around to getting another bracket. I now have to manually move it past the switch button into neutral. In the end not a big deal as I have gotten use to it.