Hi, I have a Mountfield SP534 TR 2006 lawnmower that is in need of repair. The engine starts fine after a few tries and then just dies. It seemed to be in good working order, with new fuel, oil, clean filter etc. and was always stored indoors. I checked all the troubleshooting suggestions in the manual and recently fitted a brand new spark plug based on suggestions I read on numerous forums, but nothing solved the problem. I also had to replace the recoil starter and fuel tank to repair a known fault with the design, and that seemed to work fine. I can usually get the mower to start, and on occasion I have been able to mow a small amount of lawn before it just loses power and dies. It has been suggested there may be problems with the carburetor, but I know zip about deconstructing engine parts and I don't want to throw more money at it before knowing what the problem is likely to be. Can anyone suggest what the likely cause of this could be and how to fix it? I was forced to buy a new mower, but I'd like to be able to salvage this one too. Kind Regards, Dianne.