One of the interesting debates...272 vs. 372xp original edition. To me the 372xp OE with its better anti vib system, inboard clutch, and better cylinder design is a significant upgrade. The 372xp OE cylinder is a "quad" port design and also has more cross sectional area in the transfers than the 272's...more power. A little more stroke on the 372 (more bore on the 272 is 52mm, the 372 50mm) which is interesting. My guess is to get better primary compression characteristics to feed those bigger transfers, but you never know with those engineers. One of the issues the older 266/268/272 class saw had was heat to the carbs through the mounting screws. The carb/heat issue is one I've HEARD about but never experienced BTW...
The rubber intake boot arraignment both isolates the 372 carb better for both heat and vibration. Just little stuff like that through out the saw makes the 372 one of the best designs ever. The inboard vs. outboard clutch is another of those endless debates. Inboard clutches have some advantages like having less distance from the bar centerline to the edge of the clutch cover.. but the outboard clutch keeps that heat away from the cases AND to some make the saw theoretically handle better. I think thats a subjective thing. For me the ease of changing the chain or bar & chain removal/replacement is an advantage. It is something done frequently AND its a lot easier with the inboard clutch like the 372 and BTW many of the pro level Stihl's have. JUST an opinion. Actually for me the 268 was a bit more rugged than the 272's, a little less bore, more wall thickness in the cylinders. NOT a lot less power. A good 268xp is a great saw. BUT nostalgia aside, the 372xp and all its derivatives are better in many ways to live with..in my most humble opinion. I have both and spent time with both..
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If you get this far....wow, no body reads the addendum! Last but not least. 372xp X-Torq. They are heavier than the 372xp OE. Have more vibration....use less fuel. Had more issues. Better than a 272/268? Not as clear cut but yes. AND the parts are current and available. That brings up another issue.....the 266/268/272 series have been obsolete for quite some time, and while variants are still being produced; parts aren't as easy to find at places like your local dealer. Both 372xp Original editions and the newer current X-Torq versions are plentiful and commonplace. Husqvarna dealers are likely to stock whatever you need. For the enthusiast, the 272's are EASY to work on, but so are 372's. Also there is Aftermarket support for the 272's and actually sometimes that is the best option. But there is also for 372's. Parts are cheap, plentiful, and available for the entire 372 series and for that reason even for the enthusiast the 372 offers more opportunity......bottom line? Unless your into nostalgia, the 372xp OE and even the XT are a better place to invest time and money in ..again..my humble opinion...and that's before getting into resale...