[FrankF3]

I had the problem on my 1772. I thought I would have to clean the tank and the rest of the fuel system too, until I pulled the valve out of the bottom of the tank. I don't know what the PO did, maybe siphoning fuel out of the tank as best guess, but the filter on the valve was smashed flat as a pancake. It was not flattened and still protruding upward into the tank, but flattened and at a right angle as if laying on the bottom of the tank. I don't know how it even ran. I simply replaced the valve with a new one since the screen on the old one was clean but flattened.