Re: Where does this go?

Posted by HH56 On 2018/5/1 12:40:56

It is not stock but looks like it may have been some sort of additional grounding solution. The stock arrangement is the tank opening at the bottom, rubber O ring next, sender laying on the O ring and then retaining ring at the top. The ground is established between the sender top and retaining ring so perhaps that serrated item was something added between the two to provide a bit of "bite".

The ground can be erratic at times -- particularly if the tank has been removed and then replaced. Many have opted to solder and run an additional ground wire between the sender top and a ground screwed into the frame to avoid potential issues. If you don't want to try soldering drill a small hole at some point on the the sender surface to add a small screw to hold the ground wire. If done carefully the screw should be leak tight but if wanted, a bit of sealer would give additional assurance. Others have opted to add a small sheet metal screw for a ground wire at one of the corners of the tank center flange where the two halves coming together have provided a bit of extra metal where a hole would not present any leak danger. If there is good tight contract between the sender and retaining ring that is also a good solution.