Fuel sending unit and fuel gauge issue.....

[SkunkBoat]

60 gal tank but you will never get 60 into it before the vent spits. And that varies depending on how the boat is sitting. If you're in the water, it really varies...
also, don't bend it, you need to move the arm pivot point up or down and or adjust the length of the arm.
Bending will just make it wrong the other way.

If you read 1/4 when you are near empty, your pivot point is too low,or the arm is too long, or you need to turn the unit so the float arm orients along the centerline of the tank.
(i.e. its hitting the side of the tank)

tsubaki got it right, the v in the belly tank makes it impossible to be accurate thru the full range of the gauge. Watching it as you fill from empty is the ticket...
Of course, once you launch the boat it changes and varies by load.
They can make a calibrated one but $$$$$

I can put about 5 gal in mine after it pegs on full...just not worth messing with it.