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Hi - How much fuel should flow through a shutoff valve by gravity feed when open? I am getting a trickle - the fuel line is less than full. This is directly after the shutoff valve. I removed the valve, blew it and it's screen both ways with air, brake cleaner, and gas. Poked around with a wire. It passed plenty of air under pressure. Reinstalled with a new grommet. Pretty much the same output as before.

Running a Tecumseh 10hp engine. At idle to moderate throttle, all is well. At high load, the fuel filter (after the valve before the carb) slowly but surely empties out and it stalls.

Maybe the valve screen has hardened varnish that doesn't really show, but reduces flow? Or... ????????

Thanks for any ideas, including a spec on what is adequate flow and how to measure it.

R

Do you have flow from tank to valve? If so I would remove or replace the valve. While your at it replace the filter to.

I usually remove shut of valves on my machines don't need or use them. Can easily replace the whole fuel line from tank to carb and a new filter less than $10

Have checked the vent in the gas cap?

Thanks - the shutoff valve fits into the bottom of the tank directly, so I would have to find the right fitting to run gas line direct from the tank, either with a new inline shutoff, or without one. Will consider that, but, this is on a generator, I plan to go to duel-fuel, and I want a shutoff for the gasoline.

Yes, the cap is OK, same results with or without cap in place.

BTW, it is 1/4" gas line.

Just remove the valve and check flow. You don't need a hose attached to check if gas will come out of the tank.