I've got an 06xt that won't start on warm starts intermittently. Starts fine when cold, but once it's warmed up sometimes it just turns over and over. If I let it sit a couple minutes it finally fires up and runs good again. I just replaced the fuel filter yesterday and it's still doing it. I had a walboro I put in with it, but swapped that out just a bit ago. I think the pump, albeit new, was bad.