How many lbs of pressure is there when a double line pressure tank is in use?
When in use the pressure supplied by the outboard motor will determine tank pressure, even if the tank is in the sun. The motor would have to draw a very small of fuel for a tank to build up pressure in the sun with the motor running. I don’t see it happening. If the tank is hooked to a motor that isn’t running I’d expect the float and needle valve would be over come by pressure well below 15 psi, but I don’t know what pressure. If a tank is sitting in the sun and not hooked to a motor that is when I’d expect to see the highest sun generated pressure. Just rambling as I have never used a pressure tank.
