differences between 266SE and 266XP

[Rubicon]

Hi guys. Purely out of curiosity, could someone list all the differences between the Husky 266SE and 266XP? Which one had the most power? Thanks!

 

[clearance]

had a 266xp, killer saw. Xp saws always have more power. Probably had a different carb and maybe bigger bore.

 

[Rubicon]

I just checked Mike Acres' site and found out that these saws have the same bore and stroke and same carburetor series. However, the 266SE has an operating RPM of 8500 whereas the 266XP has an operating RPM of 9300. What gives?

 

[glens]

Differences in port configuration.

 

[SawTroll]

I just checked Mike Acres' site and found out that these saws have the same bore and stroke and same carburetor series. However, the 266SE has an operating RPM of 8500 whereas the 266XP has an operating RPM of 9300. What gives?

The Husky 268 and 268xp, and all the variants of the Jonsered 670 also had the same bore/stroke, and the same "chassis" - I think.
The 266SE(and SG) had the least power, and the hottest 670 Champ the most - 4.9 hp if my memory is correct.
These saws also shared "chassis" and a lot of other components with other models in the 61 to 72 cc class.
The Husky 268 (not xp) is still sold as a current model in large parts of the world. I think the 61 is still sold somewhere too. I don't know if these saws are old stock, or new production.

 

[rmihalek]

aftermarket changes

I bought a seized 266SE off eBay and was able to get a new top end for it for not too much money. The interesting thing is that the aftermarket top end serves as a replacement for both 266SE and 266XP saws, so I'm not sure what I have at this point. I have a tachometer now, so when I can get some time to get out and cut (probably at Jokers' get together) I'll have to see how it revs.

 

[Justin Garrison]

My friend has a 266? It says se on the serial number plate, but xp everywhere else. I guess the everything else has been replaced somewhere along the line. Nice saw though.

 

[SawTroll]

........the aftermarket top end serves as a replacement for both 266SE and 266XP saws, so I'm not sure what I have at this point.......

If "aftermarket" means Husky spare part, my guess would be that it is an xp top end. Rationalizing inventory of spares in that way has been done by other manufactorers as I recall, and it wouldn't surprise me if Husky does the same thing.
I think there is members on this forum that can tell you how to distinguish a closed loop top from a open loop one - but not me.

 

[TonyM]

Justin,

My uncle had a 266 that was both an SE and an XP that he bought new. Husqvarna must have carried both suffixes for a while before finally dumping the SE. I almost think the recoil cover said "266SE XP".

 

[Mange]

The SE Hag a two ring config at some pistons, not all. XP has one, both are piston ported, but as Glens said there is a timing difference.
Both have HS224A. I can not find any other big differences.

 

[rmihalek]

Well, I just was out cutting some bone dry red oak with the 266 with the aftermarket (Tecomec) jug. After some adjustments, the saw seemed to run the best at around 9800 rpm through the oak and it "four stroked" bit when I pegged the throttle out of the wood, so I don't think it's set too lean. So, it's probably an XP top end as SawTroll speculated.

I seem to remember the piston had a single ring but I can't recall if the transfers were open or closed.

Bob

 

[Mange]

If it is piston ported, there is a circular bottom at the Cylinder, and the same in the engin block, I would think all XP is piston ported.
A piston that runs in a cylinder with open fluch ports is not ported.

You can put a piston ported cylinder/piston on any of the engin blocks, but the open config will not work unless there is a bit dremmel work.

 

[Mange]

I am not sure that makes sence to you all, but I gave it a try.

 

[TonyM]

Mange, I think you are talking about closed versus open transfer ports.

 

[Lawn Masters]

I kinda understand what he's saying, in plain english, it would be easier explained in pictures than words.

 

[Mange]

Yes, that is correct.
That is the differance in XP from regular SE, as far as I can tell.
I only have the 266SE to look at, but I have the papers on both.