Thanks - forgive my ignorance and additional questions but I want to get this right.
The fuel line on the Argo comes out of the tank under the seat and then is tucked under the body until it enters the engine compartment so I can't see where I would put the fuel pump except in the engine compartment. The vacuum pump is, of course, mounted right on the engine and is just downstream of the fuel filter. Would I not need to put this one in a similar spot? I am also confused why you would put the T fitting UPstream of the pump - surely it would be DOWNstream as that is where the pressure would be produced isn't it? (I am interpreting UP as closer to the fuel tank and DOWN as closer to the carb - is this wrong?)
In order to get the fuel back into the fuel tank wouldn't I need to drill a small hole in the tank to put the return hose through?
This behaviour has been on and off for a couple of years. Last year I replaced all the fuel lines and had the carb rebuilt and that seemed to stop it for a while but it is back to its old behaviour again now. I had a new diaphragm fuel pump about 3 years ago. Probably driven about 15 hours since the carb rebuild. Machine has just over 300 hours on it in total.
Thanks for taking the time to answer these questions.