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

I believe that engine uses a magnetic trigger for the ignition. If so, unplug the sensor from the ignition box, Ana trip the sensor by turning the engine, while reading continuity across the wires.  If “triggering” the sensor by turning the engine doesn’t close the circuit, the sensor is bad.  That is more likely than the CDI box failing. Also, check the ground wire from ignition to the engine block is secure. Attempting to run them with no ground connected can burn up the ignition.  Let us know what you find.