UPDATE

The problem appears to be the fuel line between the tank and the carb. I can get fuel into the engine, but as soon as I stop priming, the fuel runs back down the pipe.

Also, I don't know if it's connected, but there was a puddle of fuel on the chassis. It would appear that fuel is leaking from the pipe connection to the tank even though I have it fixed tight with a cable tie. Is there a better way of securing the fuel pipe ?

Thanks for your help guys.

regards,
32819toon