Originally Posted by
Ponyryd
As stated often times boasting a battery can do stupid stuff to the electronics. You may need to remove the cluster and re-time the guage. I've often had clusters out for this same issue, usually turn them upside down, and lightly tap them to reseat the needle in question.
Do you know how much fuel was in it? Smart guy like you would likely have the tank full for winter storage, so you could try burning some of that fuel off, and filling at afterwards, the needle may return to its proper position.