Instructions: 1: Turn the flywheel by hand to see if it is smooth. 2: Check whether the sliding parts are clean. 3: fill the alcohol lamp to less than two-thirds. 4: Light the alcohol lamp on the front end of the test tube. Turn the flywheel after about 1 minute. The engine is spinning. The warm-up time with the generator is slightly longer. Precautions: 1. Do not touch the baked test tube and the metal connected to it to avoid burns. 2. Light the alcohol lamp for a long time, and the alcohol lamp should not be touched easily to avoid burns. 3. When heating, the alcohol lamp cotton thread should not touch the test tube, and the piston should not be refueled. Both ends of the connecting rod need to be lubricated.