Alcohol with a concentration of more than 95% is required. Place the engine model in a horizontal position. Check whether the model flywheel is running smoothly, whether the connecting rod is connected properly, and whether the cylinder piston is sliding properly. Add alcohol to the alcohol lamp (please bring your own alcohol with a concentration of more than 95%).Ignite the alcohol lamp to heat the hot cylinder for about 20 seconds, and gently move the flywheel until it can run continuously. Hands should not touch high temperature parts such as cylinders during heating to prevent scalding. After use, please put out the alcohol lamp and put on the dust-proof bag after the model is cooled naturally. Children should operate safely under the guardianship of their parents. High speed of engine model prevents vibration from falling to the ground. This item is in the category "Toys & Hobbies\Models & Kits\Tools, Supplies & Engines\Engines". The seller is "unaliu*2010" and is located in this country: CN. This item can be shipped worldwide.