This heavy duty momentary 50 amp push-to-start button with LED light-up option (depending on how you wire the button it can be 'ON' all the time or only light up when you press the button - which also acts as a warning of a stuck button) is rated to cope with the large momentary current surge experienced with many engine starters. With a +/-22mm fitting hole, this 34mm diameter switch has  three screw terminals at the back of the switch for easy installation.

Image for illustrative purposes only