Standard 1st Post for a long time lurker...
My '72 Series III Petrol is having issues with pumping fuel to the engine. It will run great for about 15 minutes (20 miles) and then when I try to start it again after leaving it sitting for a few minutes it will not start. The in-line fuel filter is nearly dry, and the fuel pump does not pump enough fuel to the engine to keep the motor running from what I can tell looking at the process.
When I start it cold and it runs, the fuel filter looks like it barely has fuel in it, only about 1/4 inch deep in the filter. From what I've read, this should be nearly full of fuel.
I've replaced the fuel pump with a Proline one, and no change really. My next step is going to be to give the tank a good rinse. There was not a screen on the end of the fuel line into the tank, but I don't think this would be restricting fuel. My other thought is that the tank is not vented properly and it is becoming a vacuum in there to restrict the fuel flow. When I've taken off the gas cap there is no change to the fuel flow.
Any help is appreciated. I have a new fuel line from the pump to the tank on backorder, but will check to see if this line is fully clean tonight.
Kevin