Replacing your tank float.
James, These are standard automotive floats as far as that goes. Be certain to get one made of aluminum and not steel as there can be a high probability of a ferrous one rusting badly. My guess is that you'll need one 12" long. Measure the outside of the tank to determine the proper length bearing in mind that the float arm can go below the aluminum assembly somewhat. The sending unit will only fit in one orientation due to the asymmetrical five hole mounting pattern. This assures that the new float arm will face the right direction in the same manner as the old one. To make sure you got the correctly rated sending unit (you will have), dry test it before installation by wiring it up outside the tank (don't forget the ground) and by moving the arm up and down, you should see the gauge respond accordingly. Other than the usual sealing of the gasket to the tank and underside of the sending unit plate, I think that about covers it. Good luck, Glyn Judson, E31 hull #55, Marina del Rey, CA