Pulled fuel line from avs to filter, from filter to pump, from pump to hard line by front fender, added new filter all new rubbers, blew air through hard line, had rag tied over other end, clean, added carb cleaner blew it through clean, added more blew a little, just to get it through, let it sit still clean, all seems good. Next me and my hospital swapped boy drained tank into can, it took 1 and a half 5gal to capture all that preethenol gas, it smelled up whole neighborhood, been there since late 1980's. The last gallon was all rust, globs of it, was going to use old gas for clean ups but it smells to bad. I reckon my 4 on the floor is getting a new tank. Never worked on carb before, reckon i'll see what happen at fire up to worry about that.