Re: fuel capacity
Are you saying the tank is actually full or that the gauge says the tank is full. If fuel spits from the tank vent, its full. If the gauge says its full long before the tank is full, you have a very common problem with fuel gauges. They may be accurate at some point on the scale but very few are accurate across the entire scale. Look at it this way. A pyramid shaped tank with a float style gauge would obviously register full when the tank is full. However, only about 1/3 of the fuel is in the upper half of the tank (the narrowest part). When the gauge reads 1/2 you have roughly 2/3 of a tank remaining. The problem here is simply one of linearity. The float rises at a linear rate yet that does not correspond to the shape and volume of the tank. The only solution is to calibrate the gauge for EMPTY as that's the critical point. It doesn't pay to know its accurate when FULL as you know that anyway because you just filled the tank. You want to know when its nearing empty. Adjust the float accordingly or install a fuel flow monitor like the FF41 which provides an accurate measure of fuel used.