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

Below the whistle there should be an aluminum ball that acts as a sort of valve. Did you misplace it?
I don't see it in your photos. I see your engine has what looks like set screws on the flywheel. These
are not original. My engine has a hole drilled on the hub of the flywheel which matches up with a hole
in the shaft and is secured with a pin.