I think the 339 is also an evolution of the 333, which is probably the Asian edition of the 335. I eventually screwed up my 333 by thinking that I knew better than the people that said that you can't modify a clamshell design. The oil pump shaft broke once and there were other issues. I got pretty good at completely tearing it down, which is required to do just about anything on the saw. Have to question why they design saws like that. It was light and ok for small limbing. The 333 didn't have a bulb, easy enough to start without one. Probably some EPA carb thing why bulbs are now required. Not a fan of them either.