I have a 2004 Lazer Z Liquid cooled and at the end of last week ran into issues..... When the mower runs without the blades on i have no issues, but when blades are on and under load it will sputter and shutdown if I dont shut the blades off... This seems to happen after the mower has run a little while... My shop has spent 2 hrs on it and havent found anything yet. They said they think they have it narrowed to the carb/jets.... They think they could be clogged or defective... They said if they have dirt in them or water that I will be responsible for the 5 hr service bill.... The manager did say that the fuel filter was clean so I am not sure how dirt could have gotten thru to the carb... I have 2 other mowers and trimmers and blowers that all use the same gas and have not had any issues.... This Z only has 36 hrs on it(leftover), and I am going to be pissed if they hit me up with a 300 dollar bill..... Anybody have any ideas or similar issues?