The gauges are not to be trusted. We have Floscan Twin Scan fuel gauges. I fill both tanks as full as possible, reset the twin scan to zero. The fuel used is recorded. When refueling the amount recorded, and the actual gallons needed to refill the tank are usually within 1%. At the Delta Bay trip in May the Floscan indicated a use of 80.9 gallons. I refilled the tanks and could get 40 gallons in the port tank, and 39.9 in the Stb. tank.
I have 150 gallons total capacity, 75 in each tank. We always try to use off of the top 1/2 if the capacity. I have on occasion, put in more than 130 gallons at a time, so I'm confident the tanks are 150 gallons total.
I have 150 gallons total capacity, 75 in each tank. We always try to use off of the top 1/2 if the capacity. I have on occasion, put in more than 130 gallons at a time, so I'm confident the tanks are 150 gallons total.