The current engine is a replacement... I bought it used and its burned oil since day one. It stopped charging the battery a couple years ago so I've just been jumping it, there is no recoil start. I couldn't get it to start about a month ago so I took off the air filter to spray some starter fluid in the carb and when I turned the key gas or oil sprayed all over the place from the top of the carb. Maybe that's normal, but between the oil burning, the fact that it doesn't charge the battery anymore, and it not starting I figured I would replace it. It might be fixable but dont want to find out that it cant be after someone digs into it and I have to pay them in addition. I cant seem to find the model number of the current engine, but the engine that was on it when I bought it used is 220707-0639 01, but no idea if that is the original engine.