Gas gauge problems

Ok,I should have done that first,but I figured it was Good since it wasn't very old,that's what I get for figuring
It did,but it wasn't accurate,I dropped the tank and seen the float was not at the bottom of tank,I bent the arm to set float about 1/8 from tank bottom
Forgot to mention I have checked the grounding strap,it seems to be good,and when I used an alligator jumper from sender to body,the gauge didn't move