STEM Stirling Engine Full Metal Combustion Engine Hit & Miss Gas Model Engine Gift Collection. Item Name: Full Metal Hit & Miss Gas Engine. Weight: About 2.2kg (Engine + Wooden Base). Size Of Engine: 18012575mm(LWH). Size Of Wooden Base: 1806650mm(LWH). Fuel: ZIPPOOil or Gasoline. The best tappet clearance: 0.5mm. Open the bottom of the base to check the wiring of the engine, connect the fuel tank pipe, and install 3 AA batteries. Fill the fuel tank with gasoline(95#). When the filling is completed, make sure there’s no air in the oil pipe. Its role can make the mixed gasoline fully enter the cylinder. Turn on the power switch and turn the flywheel to start the engine counterclockwise on the right side of the engine(installing the flying hammer position). If the ignition device is normal and the cylinder is under normal compression, if the machine still does not start normally, it’s very likely that the carburetor needle should be adjusted. Screw the screw on the top of the carburetor, then loosen 1/4 turn, and start the flywheel. This can be done several times to make the mixing ratio od gasoline and air reach the normal working mix ratio. 1 X Eachine Hit & Miss Gas Engine.