First I had a new 55 about 1 to 2years. +1st off oiler wouldn't keep up and replaced it and shortly after would not run right.Took about a year to get it to run correctly long and well enough to cut a pickup load of wood and then i anxiously sold it for about 1/2 what i paid for it. I don't know how many problems i fixed or thought i was. It usually would run fine test cuts after a little this and that with fine tuning at home and then fail me shortly after getting in the woods .Eventually i took it to another dealer that replaced the carb and it run well until i sold it. After loosing an newish 066 in an accident, all I had was the 55 that couldn't cut a pickup load of wood most the time i had it and i was near broke from buying the 2 saws close together and needed income from chainsawing. Got back into business fixing repairable saws to cut wood reliably.
Thought I needed a 372 after I learned to use the internet and found AS . Snagged a used 1 on ebay and after about 3 weeks going through what i did with the 55 found someone to buy it as is and the dealer replaced the ignition and the buyer used it about a season, then sold it and bought a new one. Not sure if he had any more problems but evidently he didn't think it was best to keep that particular 372.