Rich: I think you must have a 6 gallon tank which, for some reason, only fills to 5 gallons.
The level should be set by the height of the overflow standpipe inside the tank. There are a number of different configurations, so I can't say where to look for the problem. Fuel should not be able to siphon back through the pump as the fuel inlet is supposed to be higher than the return. Otherwise if there were a fire in the engine compartment and it burned through the fuel line, fuel would siphon into the engine compartment and fuel the fire... (Also, there are 2 check valves in the pump.) The fuel level in the header should not drop appreciably over time, so, given this and the fact that the level is wrong in the tank, I'd take a real close look at the plumbing in and to the tank itself. In some tanks the level is set by an elbow near the filler neck. It has been shown that the elbow can be disturbed by careless filling of the tank. Maybe a good place to start looking... John Cooper Skyport Services 4996 Delaware Tnpk Rensselaerville, NY 12147 518 797-3064 www.skyportservices.net
