Looks like this is located on top of my fuel tank in a 2017 Stingray 198LX. Has anyone had problems that seem as though the boat is running out of gas and then the Engine dies, and then found it to be this Attwood Integrated Fuel Demand Valve ?
It’s basically a one way valve to prevent pressured fuel tank from pressuring the vacuum (pump) side of the fuel delivery system.
No experience with them but common sense would say either the valve is sticking or the fuel pump isn’t pulling enough vacuum to open the check valve to allow fuel to pass.
First thing I would check is for dirty fuel filter(s). I would then check to make sure all the fuel line connections are secure and tight from fuel tank to fuel pump.
Word of note…. Vacuum leaks typically don’t leak fluid. Inspect and tighten fuel line clamps as needed
