Chainsaw Repair

@KRL....."....Wow, it appears that I have been wrong twice in this thread. After looking about the internet it appears that the 154 and 254 indeed use the same cylinder and they both DO have a spigot! See the attached. I appologize for leading you astray!....
I guess I should turn in my Husqvarna badge!...."

I'm sure you're just kidding.  Trying to keep an old saw going,  this forum was like an oasis in the desert.  So thanks to all the people who contribute here.

Quote from: SawTroll on February 24, 2014, 09:09:23 am

Quote from: KilliansRedLeo on February 24, 2014, 08:31:11 am

IIRC, the 254 has a shorter stroke that the rest of the members of that family. (I remember SawTroll reminding me of that a short while back) So that lets the rest of the family out. The 272 cylinder also has a spigot or flanged base that fits down into the crankcase, the 254 and the rest of the family use flat based cylinders.

So, unfortunately I think you re out of luck. If and only if you could put the 272 top end on a 254 the cost to doso would be more than just buying a 272 and rebuilding that.

Actually the stroke is the same, but the con rod is shorter than on the 262 and 257. 

if the con rod is shorter,maybe the piston pin to crown height is taller?

Or the cylinder is sitting lower relative to the crank?

I don't know the details.

Both cylinders are flanged, but the flange for the 272 cylinder will not fit into the 254 crankcase; the opening is just too small.

It could be done, with a lot of time and machine work. I doubt it would be worthwhile to anyone but an absolute fanatic.