262 vs 266 vs 268 ??

[Chris J.]

Great thread, lots of good info!

Now I have to keep my eyes :Eye:/\:Eye: open for a 262.

 

[SawTroll]

A post made a couple of months ago, I think it fits here;

I got curious, so I looked up a few IPLs, to find out which carbs were used on the different models in that "family" of saws.

The 66 was simple, it used the HS224A from 1987-1991.

The only other one that used the same carb at any point was the late production 266SE and the 266XP (1985-1993), minus 1987 (HS224B) and 1988 (HS224C). Before 1985, the 266SE used the HS163A. That carb change may have something to do with the fact that the power and rpm specs changed on that model.......

The 61 used the same 163A all the way up to 1991, when it changed to the HS254A (not used by any of the other models).

No version of the 268 (including the late production open port one) or the 272xp "shared" carbs with the models mentioned above. The 268XP changed from HS234A/B in 1987 and 1989 to HS260A in 1990. All later 268 IPLs show the same HS260A, as do all 272XP IPLs. (the last ones are from 1997).

The years here relate to the dating of the IPLs, and does not say exactly when a change was made.

I have no idea what the difference between the different carb models is, but assume that different venturi/capacity is part of the picture......

 

[Cantdog]

Yes Niko Thanks for bringing that info back and putting it in this thread. Very useful when trying to figure what carb best runs what saw motor and level of development.

 

[PB]

When looking at carbs, I found this to be extremely helpful. See attachment.

 

[Cliff R]

A couple of years ago I bought a 60 Rancher with a bad P/C. I located a really nice 268XP P/C and made the conversion. I remember having to buy the 268XP intake and longer/thinner bolts. I had to retain the 60's carburetor and air cleaner assembly, as there were some compatability issues with the idle speed screw upgrading to the Tillitson carb, and the top cover didn't fit well over the spark plug.

The end result was pretty good, but if I had to do it all over again, I'd just buy a 268XP, or 272XP with a scorched P/C and rebuild it. This would involve simply installing a new P/C, intake/exhaust gaskets, and re-using all the stock parts......Cliff

 

[andrethegiant70]

A couple of years ago I bought a 60 Rancher with a bad P/C. I located a really nice 268XP P/C and made the conversion. I remember having to buy the 268XP intake and longer/thinner bolts. I had to retain the 60's carburetor and air cleaner assembly, as there were some compatability issues with the idle speed screw upgrading to the Tillitson carb, and the top cover didn't fit well over the spark plug.

The end result was pretty good, but if I had to do it all over again, I'd just buy a 268XP, or 272XP with a scorched P/C and rebuild it. This would involve simply installing a new P/C, intake/exhaust gaskets, and re-using all the stock parts......Cliff

That's certainly the preferable option, for sure... many have been dismayed at the little surprises this series can provide. On the other hand, it's fun if you've the right outlook.

 

[roncoinc]

Yeh,some good stuff and i can even follow it now !

Ok guys,a wrinkle has been thrown into the mess now
member Brucejr showed up with a 272 p&c ..
that should do the 268 nice i think..he has already worked the cyl but we found some places i think i will work some more as this will be a saw i plan to keep.(like i did the 262 )
so now maybe the plain 268 p&c worked a bit on the 266 should be an easy upgrade that gets good results ??
dont look like any carb or manifold problems here ??

 

[Cantdog]

That would probaly work too....

 

[roncoinc]

That would probaly work too....

Wait,,the 266 is a better cyl than the 268 isnt it ?
i guess i didnt understand as well as i thought
maybe that isnt an upgrade ? putting the 268 jug on the 266..otherwise why put the 266 jug on the 268 ?

the 272 is a good upgrade for the 268 saw,ok..
so about the 266 now ??
so easilly confused to many numbers with se and xp and none of either !!

 

[Cantdog]

Yes you are right putting the Gillardoni (reg 268)on the 266 would be not the best but would work. But if you've decided to put the 272XP P&C on the 268 case you would be better off porting the 266se and putting the Gillardoni on the shelf.

 

[brucejr]

The 268 cylinder that I gave you is off an XP saw. Should give you a bit more power than a factory 266.

 

[Cantdog]

AHHH 268XP not a 272XP that's two mm right there. I am not sure of this but have been led to believe that both of these (266 and 268XP) cyl are closed port and pretty much the same performance wise. (stock) with the 268XP just being a later version of the 266 and ending up with a larger intake and carb.. Perhaps there are port timing changes...I do not know. Both 50MM...both closed port. I guess I would have to see them to tell the difference...how about casting #s?? on the cyl bases?? That could tell us what we seek....

 

[roncoinc]

The 268 cylinder that I gave you is off an XP saw. Should give you a bit more power than a factory 266.

Ok Bruce,somehow i thot it was a 266 jug ..
Beer and football scews my short term memory !
tnx for reminding me,would have saw that when i picked it up,i wrote on it.
Ol left,should have stayed for football and beer

 

[Cantdog]

266???.........Focus Ron.........Focus..........LOLOL!!!!!

 

[roncoinc]

AHHH 268XP not a 272XP that's two mm right there. I am not sure of this but have been led to believe that both of these (266 and 268XP) cyl are closed port and pretty much the same performance wise. (stock) with the 268XP just being a later version of the 266 and ending up with a larger intake and carb.. Perhaps there are port timing changes...I do not know. Both 50MM...both closed port. I guess I would have to see them to tell the difference...how about casting #s?? on the cyl bases?? That could tell us what we seek....

OOpss,,,distracted a bit,,he came over with two p&c's
one 272xp for the 268.
and a 268xp i can put on the 266.. but will that require any intake mods ??
to much of everything for me to keep track off !

 

[roncoinc]

266???.........Focus Ron.........Focus..........LOLOL!!!!!

oh man !! going to quit for today and "focus" on beer and football and beer and food and beer and football and.................
tnx for all the help guys..
"think" i got it sorted

 

[SawTroll]

The 268 cylinder that I gave you is off an XP saw. Should give you a bit more power than a factory 266.

I am not sure that it will, if the carb and intake is the same, but I am not really sure?

 

[Cantdog]

The 272 on the 268 is good...I am not sure if you would actually gain much by putting the 268XP on the 266 without upgrading the carb/intake situation to the later 268XP setup...

 

[Cantdog]

OK Ron....LOLOL!!! sit safely and enjoy!!!!!

 

[brucejr]

I am not sure that it will, if the carb and intake is the same, but I am not really sure?

The 268 cylinder I gave him is far from stock