Mercedes-Benz 272 reported engine failure after overhaul.

Hello, I want to ask what happened to the engine failure after the overhaul of Mercedes-Benz 272. Mercedes-Benz 272 engine flameout after overhaul because:

1, the engine mixture is too rich, and then the engine locks.

2. Too much sludge and carbon on the throttle of the engine for a long time will also lead to the engine locking after overhaul. The above is the reason why the engine of Mercedes-Benz 272 was reported dead after overhaul.