My Super Z w/ 25 Kawasaki engine shuts off while mowing or during transport. It feels like it's running out of gas but the tanks are almost full. It seems as if it is from anything that puts strain on the engine, tall grass, full speed, etc. After the mower shuts off it will start again and work properly for a few minutes then slowly die, unless the blade is shut off and throttle is lowered. This machine is brand new I've only put 55 hours on it. Yesterday the clutch was replaced becuase it burned out. This problem just occured after the clutch was replaced. I was wondering if this is a common problem or has anyone experienced this before? I'm very happy with the machine performance wise but these mechanical problems are causing unnecessary downtime. Thank you in advance for any feedback.