If you are asking about stock appearing gauges they are mechanical, not electric. The instrument light bulbs should be changed to 12v. I went with the stock appearing 60# oil pressure gauge for my 235. I have had poor luck with them. The first one broke apart where the 2 brass pieces are GLUED together. It was replaced for free but it is a PIA to swap them. The replacement worked fine for a couple of months and then the needle just fell off. No way to tell what the pressure is now. Perhaps I was just unlucky but I am hesitant to purchase another one.