Okay i need some advice on where to go next. I recently just bought a 3120xp almost brand new, was in the box but never ran in the wood supposedly. So the important thing is that i can't take it back for warranty. So i got it and fill with fresh gas 40:1 and oil and it was really hard to start when following the manufactures directions. I played with it a little more and finally just figured that something it wrong. So i replaced the fuel line from the tank to the carb and that helped a lot. She started cold with out any real problems. about 5 pulls with the choke and then 2 to 3 without choke and she would be running. But a hot start was still really hard. And then when she did start it was obvious that there was air getting in somewhere as it would start and run for a second and then bog down like its running out of fuel and then run for a second and bog and then run as it finally got all the air out. So i pressure tested the carb and sure enough it was leaking. i put a new carb kit in and it hold 12psi all day long. yesterday when i was out milling it started again. really hard to hot start and when it did finally start it had air in the line somewhere as it would run then bog then run then bog for a few seconds till it purged the air. So what is the next step. I can't imagine that the carb kit is bad already, and if it is what would cause that with only about an hour of run time. its got brand new software from the tank to the carb, what am i not thinking about. help please.