So I've been having fuel issues in my m6060. I can't get the fuel to pump from the tank. The fuel pump was replaced less than a year ago, I've taken the tank out and cleaned it good, I've ran the tractor on a Jerry can off of the factory fuel lines and it ran no problem. It's got a new fuel filter. I've let the lift pump run for 15 minutes with 1/4 tank of diesel and it wouldn't prime. Any ideas on what to do?