Since I got this Lawnmower, I always had one problem: if the engine is warm, it stopped to work and it could not be started anymore. But if the engine cooled down, it started without any problem. I have replaced spark plug, ignition coil and fuel line but I had no luck. This is AS-Motor Lawnmower with Briggs and Stratton engine. I thought before I buy a new carburetor, I will try something else: GEET System (more info: JNLLabs). With GEET Setup this Lawnmower works great.

This is the heart of GEET System:

And here are some pictures taken by my 5-year-old son: