Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Thanked 31 Times in 31 Posts
Rep Power: 11
Once you get this problem 'fixed' and know your tank is full, take dowel rod and stick it down into the filler vent until it hits bottom - it makes a pretty good accurate guage of when the tank is full. Keep track of engine hours and such and you can put additional marks on it to let you know how much fuel you really have.
I'm not mathmatically inclined, but other owners have Gemini's have calculated that one inch of fuel in either of our tanks (18 gallons each, 11.25 inches sq on the base) comes out to .625 gallons per inch on the dip stick - that's a whole lot more accurate than a needle waving from 1/4 to 1/2 tank.