PROBLEM: Tank does not fill to level that seems full.

The fill of the tank is calculated with reference to the Static Floating Position of the boat. Depending on boat length and location, on trailer and potentially tilted from static floating position,  or in water, the location of the FLVV/FLV may vary depending on the location on the tank. This change in relative location to the natural leveling of the fuel in the tank will change the amount of fuel that can enter a tank before the valve closes and the fill nozzle is shut off. For example, if the FLVV/FLV is at the bow of the tank and the boat is at static floating position, the fill should be normal. If that same boat is tilted bow up during the next fill operation, then more fuel will go into the tank because the FLVV/FLV is higher than before. But, if the bow is down from before, the FLVV/FLV is lower than it was before and the fill of the tank will be less. In some cases, depending on each boat variation, this change in tip angle can be larger than the required angle that was used in the calculations for the tank and the resulting fill can be too large relative to the overall tank capacity. See also section above on rated capacity.

If issues persist, fuel system design may not be adequate. Contact the boat’s manufacturer and then the fuel system designer.