78 express fuel leaking from overflow tube

every since i put a inline fuel filter on my express as soon as i turn the gas on it starts draining out the overflow tube any ideas on why this is happening. also i need the filter due to how rusty the tank was

Re: 78 express fuel leaking from overflow tube

Float valve not sealing because of the rust or the drain screw is not sealing well and letting the gas just flow out.

Re: 78 express fuel leaking from overflow tube

ok ill take carb apart and look at float its not the drain screw because i tried another bowl.

Re: 78 express fuel leaking from overflow tube

Either the float needle isn't seating or the float may have a hole in it, allowing it to sink.

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