Features 1 It is a mini mini engine with an air cooled structure and a carburetor with adjustable speed 2 Made of brass and stainless steel unique and exquisite The structure is stable and reliable Come with wooden base for operating conveniently You will love this retro and refined Mini gasoline engine model 3 This exquisite engine model is simple to operate You can observe and understand the working process and principle of the engine It can also be a great personalized gift for fans of mechanical craft models Engine Start Steps 1 Check engine wiring from wooden base then connect tank tubing and install 3 AA batteries 4 5V 2 Fill the tank with 95 gasoline After filling rotate the flywheel clockwise several times on the right side of the engine power switch surface This action allows the fuel mixture to enter the cylinder completely ensuring that there is no air in the fuel line 3 Turn on the power switch and then quickly turn the flywheel clockwise to start the engine on the right side of the engine the power switch surface Notes 1 If the ignition is working and the cylinder compression is normal and the machine does not start properly it is likely that the carburetor needle will need to be adjusted 2 After tightening the main fuel pin on the carburetor loosen 1 4 turn and start the flywheel making the mixture ratio of gasoline and air to the normal working mixture ratio 3 When the machine stops running turn off the power switch Specificat