We inherited a Jacobson’s green 4 mower,with a Kubota d722 engine, we are a bit stuck with the fuel delivery system. We would appreciate any help below are some photographs and an explanation of the current fuel set up. The diesel tank has two fuel pipes coming out of the bottom of it, one on opposite side of the tank, one is the traditional system where the pipe goes to the fuel filter and then onto the fuel pump. The other pipe goes to the end of the spill rail and exits the end of the spill rail and enters into the fuel pump, is this a normal set up? Normally one end of the spill rail is blanked and the overflow pipe goes from the non-blanked end back in to the top of the fuel tank. any help would be greatly appreciated, you can just about see on the photo the fuel pipe entering the spill rail it has a sliver clip. Bottom photo spill pipe entering back into the fuel pump.