Given the number of suggestions and the time it takes for the fuel already in the line to run dry, I think field testing is in order. That means I'll have to drag the boat over to the local lake, find a nice quiet cove to sit in and run through all the possible causes/solutions to the problem. Could take me hours or even days if the weather is nice! Oh woe is me
I hope that this is just a case of the selector switch not engaging properly but now I know a lot more about the fuel line setup. That's good knowledge for the next issue. There's always a next issue, right?

I hope that this is just a case of the selector switch not engaging properly but now I know a lot more about the fuel line setup. That's good knowledge for the next issue. There's always a next issue, right?