Originally Posted by Dxt22

I have an OFNA Picco .12 engine, and I have run about half a gallon of fuel in it so far. Break in was smooth, and I still preheat the engine as there is still significant pinch before start-up. However, after running about 4-5 tanks of fuel, the flywheel locks and does not turn, even after I again heat the engine to close to 200 degrees.

The last time I ran it, the engine got stuck and still refuses to turn over, even after heating it. Could this be a problem with the connecting rod, the crankshaft, or something else?

Thanks!