vaccum on my seditment bowl on an H

Eureka, Archemedies. Air displaces water, sometimes.

The air in the line had to go somewhere. You're not giving the air a place to go unless you open the float bowl, like BobM said.

As the comedian in the Catskills said - Everybody has got to be somewhere. The gas out of the tank has to displace the air in the fuel line. If air has nowhere to go, it doesn't let new gas in the sediment bowl. Everybody has to be somewhere. So either let the gas be consumed by the engine, or let the air bleed out through the float bowl.

Moral of the story is -- basic law of physics: two thing cannot occupy the same place at the same time. Simple as that. Fractured fairy tales.

P.S. I also have an H. The fuel line is not a vacuum; it's like a subway in Tokyo during rush hour - -there's no place for the air to escape, and each Japanese - like each air molecule - can only be squeezed so hard.

Additional reference is Archimedes around 1900 years ago as to why iron boats can float and gravity feed fuel systems only go so far.

Have fun with the H. That's the main thing. They are super tractors.

Steve

If you want proof try this: Remove the drain plug from the bottom of the carb bowl, then open the sediment bowl valve. The sediment bulb will fill almost instantly to replace the gas flowing out of the carb drain.