Chainsaw Repair

  You most likely have 1 but in addition to the last post, if your having trouble with the muffler bolts coming loose, put a 353/346 muffler brace on it.  The 45mm jugs were the worst about this because of harmonic vibration issues.  The 44mm not so much.  Running it loose will strip out your bolt threads & put a hole in top cover.  That model does not have a plastic case, so your good there.

OK that confirms it you have your series mixed up.

2159 is like the 359 and smaller bore 357.