My fuel gauge shows full all the time, problem is in the sender unit. I have the replacement unit (in the meantime I am and will continue manually log engine hours) but would like to know if in order to replace the sender I have also to open the clean out cover next to the sender? It is a 40 gal tank B41-2003 , one of nuts molded in the plastic is turning an idea how to fix that would also be appreciated.
Thank you.