I got tired of my gauge reading reading empty with gallons to go so I took my pump assembly out and discovered that Polaris is using the wrong size arm for the float in the tank. It is too long and the float hits the back of the tank when you set the float to the correct height. I had to reverse the bend in the float arm and arch it so it has a length of 8 inches total from the 90º bend at sending unit to the center of the float itself. Then with the pump assembly in the upright position on a table I made sure the arch in the arm ended with an inch and a half of space between the table and the bottom of the float. My gauge now starts flashing empty with about two and a half inches of fuel in the bottom of the tank instead of almost 5. There is a trade off though because of the size of the tank and the way the unit is mounted that it will also read full longer before the gauge starts to move but when it says empty its pretty darn close.i took me about 6 times of pulling the unit to get it right and a little tip is to put silicone on the threads for the pump ring so it will screw down nice and smooth and you'll get the tightest seal.