Thanks Tom and Jack. I turn the left wheel, it and the center wheel lock in. I turn them by hand to zero . when I turn the reset , they do not move until the 0/10's locks in with both 7's then they turn with the remaining reset cycle . The shutters open and they're back at 77 0/10's again. I might try hooking a drill to the underside and turn the whole meter to 99 9/10's gallons and see what happens? Might give you a shout sometime Tom. I'll let you know if I'm gaining on it. Thanks again