Chainsaw Repair

Thanks for all that Bob.  I also agree with the last paragraph.  Same applies with guys that'll ditch a perfectly good 50mm closed port p/c on a 266XP or 268XP in favor of a 52mm 272XP top end (especially an AM 52mm top end).  Silly.  I have a friend who does this.  I've told him he has a permanent buyer for any good 266/268XP take off top ends here.

Those guys are nuts. You can't even get OEM 266 or 268XP top ends anymore. I understand that there's a certain "big bore" mentality that exists here in the saw world. "no replacement for displacement" and all that. But the difference is mostly a stop watch deal. Timed cuts and work cuts are 2 different things. The gain is not worth dumping an original cylinder in good shape. Especially with the aftermarket kits as you point out. I'll take a 50mm OEM jug over a 52mm aftermarket kit every time.

Is the 51m XPW jug the same cylinder as the 375K jug, or are they different castings?

Quote from: Eccentric on April 07, 2015, 09:07:01 pm

Is the 51m XPW jug the same cylinder as the 375K jug, or are they different castings?

Pretty sure it's the same casting.

So am I, and the 51.4mm jugs have much narrower transfers.

I don't think the main point with using them on the XPW saws about 2006 to 2009 was increased power - it likely had more to do with EPA and/or the "big bore" mentality among costumers?

The CP 48mm jugs also have much narrower transfers than the 50mm ones.

I may have to try it on one next time.

May be yours! Pretty sure you have the bigger cylinder? Built another 50mm