Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Hi, first of all, every engine will be shipped after careful debugging to reach the normal start. The carburetor has been debugged to the best working state. Therefore, it is recommended not to make too large adjustments!
Without compression, there may be foreign objects at the valve, which prevents the valve from closing properly. You can unscrew the four screws on the cylinder head. Check the valve. (This kind of small valve is only 6MM).