a idles fine but losing power underway

[Shorething 2010]

a idles fine but losing power underway. Starts fine but when I’m underway the tach drops and stalls. I can hear the fuel pump buzzing but apparently not getting gas. Can the duke pump be bad? I already replaced water separater, fuel filter in carb and replaced plugs. Cap and rotor are fine. Like I said, idles perfectly but when you bring up the rpms it just dies.

 

[Scott Danforth]

what motor?

have you checked the anti-siphon valve?
is your vent plugged?

 

[Shorething 2010]

2000 27 Sundancer w/twin 4.3 Alpha one Gen 2.
A friend said it may be sucking air at the water separater seal. He suggested taking the water separater off and clean the mount. While doing that obviously would that a look at the gas in the filter and all looked fine. Fired it up and took it for a spin and apparently it worked.

Im having an issue at idle which I think may be from my cleaning the carbs with Gumout cleaner with the engine running. Going to take it for another spin and see if maybe it may resolve itself.