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

[bgreene]

Reads between 1/4 - 1/2 full but WRONG because I only had 5 gallons of fuel remaining in the 60 gallon tank ( it filled 55 gallons at pump )

I suppose i need to bend the float arm up a bit, but how much ?
Any ideas ?

1996 Wellcraft V21 specs indicate 60 gallon tank, not the 70 gallons some suggest.
So assuming the spec of 60 is correct, when I have less than 10% fuel remaining, gauge should read less than 1/4 tank .