Hi, maybe one of you can help me further. The problem is a Tecumseh OHV in a 11.5 HP MTD lawn tractor. The engine spings well, runs briefly and then goes out again. The following works were done: tank cleaned, fuel filter renewed, spark plug replaced. In the carburetor some rubber rings were swollen, instead of a rep set it was completely replaced for a new part. Fuel flows more than enough to the carburetor, the float chamber is also vol. l. The ignition spark is regular and nice blue. The air filter is clean, the battery is full. After a problem-free cold start the engine dies after approx. one minute and is difficult to start and then after a few seconds to go out again. Until the sudden death it runs clean and without any signs, then suddenly to go out – as if it were switched off. If you put a few drops of petrol into the intake tract, the engine starts immediately, but after a few seconds– when the fuel is burned out again. When the engine is running, the full speed is 3000 rpm, the idle is almost 1800 rpm (measured). The dealer is at the end with his Latin and I honestly also wrote. Who of you has an idea? Thanks in advance.