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

You need to open the needle at least 1 turn. A bit more if you don't preheat the carb and cylinder.
Don't you have a pulley on one of your other Chinese engines? The crankshaft shafts are the same sise so they will fit right on. But you have to move the right side flywheel in. Loosen the four screws on the flywheel clamp about 2-3 turns. Use a small screwdriver (flat blade, - ) to pop the two halves of the clamp apart. Then you should be able to turn and move the flywheel in. That will give you enough room to mount the pulley