Before I take it apart, what do you guys think this one is? It was given to me by a close friend, it is about 15 years old , but was only used a few times, not started for the last 10 years, I cranked it up this morning and it run like a champ, very easy starting, probably a bad fuel line as it leaked fuel in the worst way, could it be a 26 cc Ryobi (it has carburator and muffler to the rear of the engine, same size as the 31 cc Ryobi weed eater that I have, I'd probably be better off using my own 31 cc instead of this one, which is 26 cc, what say you?