Need some help here. I have a Huslter Super Z with a 31hp Kawasaki. I think its a 2011 model. Anyway, After cutting for about 15 minutes it starts to choke out almost like when you get off the seat when the blades are engaged. It will start to choke like its not getting gas then it will go back to full idle and run fine. The problem gets worse as I'm cutting and does it more often. Then it finally gets to where it will idle all the way down and cut off. Sometimes when its about to cut off I can shut the blades off and it will go back to full idle. Then I back off the throttle and engage the blades and it will be ok for a few minutes and then start to cut off again. By then its so bad that if I don't get the blades cut off in time, it will cut off every time. A few things I was concerned about was a clog in the fuel tank lines. Switched tanks, Same problem. It has only done this with the blades engaged. I have also thought maybe fuel lines or filter? But shouldn't the problem still happen with the blades not engaged? Maybe a loose connection? It strongly resembles the seat safety switch when you try to get off the seat while the blades are running. And I also thought the battery? I keep my battery on a tender but for the past few months I have had to use the jump box to get it started even thought my battery tender is showing green. I hope somebody can help me so I don't have to dump a bunch of money into this trying to fix it. Its the only mower I have so I can't really afford to be without it for long. I am thinking of buying a new battery tomorrow to see if it works but money is really tight this time of the year so if that's not a good idea then I will wait. Just a note: I already had the small red wire behind the engine replaced a couple years ago and this is a completely different problem. With that the mower died no matter what.