266XP Cylinder

What options do I have on a cylinder for a 266? I have a very nice 266XP with a bad piston and cylinder, I would love to find a good used 266 cylinder but what else will work on this saw in a pinch? From what I can tell a 61, 66, 266, 268, and 272 P&C will work on it. What would the best choice be? 272?? Is one cylinder close to having the same ports?? Ok, done with the questions....for now.

Bigger the better.
No replacement for displacement.

I cant help answer your question, but let me know what you decide

PM sent.

You will have to change the topcover and intake if you want to use the 268 or 272 top end. You will probably also have to find a longer plug wire. You can use a 50mm 266 or 66 top end, or a 48mm 61.

Saw Dr. said:

You will have to change the topcover and intake if you want to use the 268 or 272 top end. You will probably also have to find a longer plug wire. You can use a 50mm 266 or 66 top end, or a 48mm 61.

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Actually you should not have any problem with the 50 MM Mahle 268XP or the later 50MM 268 Gilardoni cyls. They both fit (tightly!!) under a older gray 61 top cover with only a very little interference with the isolation block and the partition inside the cover between the cooling area and the carb box. This is easily trimmed to fit on the 61 cover and may not be an issue on the 266 as that is already designed for a 50MM cyl. I have used both of these cyls on the 61/268XP conversion in my sig. Plug wire is fine too as well as the carb (224 or 163 Tilly probably) However you can up grade to the 260 carb and isolation block from a 268 with only slight modifications the the top cover to access the idle screw. SD is correct concerning the 272 52MM top end. You will need all that he said with this setup. The 272 will bolt to the cases and can be made to work but with much more modification/replacements. If you want to just make it runnable a 61 or 266se/sg will work fine, but if you want the most bang for the buck with the least work/mods I would go with the 66, 266XP or 268XP cyl with your 266XP carb/isolation block setup. Good luck, these are fun and powerful saws to work on with many variations and choices of parts to use.

Husky 266xp p/c options

You may also use a Jonsereds 630 P/C . Its 48mm, but everything fits.

willysmn said:

You may also use a Jonsereds 630 P/C . Its 48mm, but everything fits.

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Yep, tis true. I missed that one. Direct fit. 625 or 670 too but with those because of the external impulse line you would have to have the correct Jred carb and choke pull. However the Husky pull will work fine if you flip it over.

Got you covered sir, just sent you a pm in fact.

What is the difference between the 266 se and 266 xp??

I believe the years they were produced is the only difference.

266 xp and se

A couple of comments. Thanks to Cantdog for all the infor on the cylinder swaps on to a 266, especially the information on the 272 cylinder.

There are 2 cylinders for 268 and so perhaps for 266 too, and tha t is the difference for XP and SE possibly. Open port and closed port.

TRI955 said:

What is the difference between the 266 se and 266 xp??

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I am not positive on this but I believe that the difference between the XP cyl and the SE/SG cyl is the XP is closed port and the SE/SG is open port. This would equate to the 625 Jred and the 630 Jred. Same bore 48MM and same everything else (except carb). The SE/SG usually came with the tilly 163A carb same as the 61. The XP came with a 244c carb. But as far as the cyl is concerned I think it is the open (SE/SG) vs. closed port (XP) Again I may be wrong on this as I have never had either of the 266s. But I do know the SE/SG is a detuned version of the XP. The same as the 268 and 268XP, the early closed port 268 XP P&C is made by Mahle and the later open port 268 P&C is made by Gilardoni. The XP is a much stronger running setup.

Hey Moss Man how's the summer treating you?

willysmn said:

A couple of comments. Thanks to Cantdog for all the infor on the cylinder swaps on to a 266, especially the information on the 272 cylinder.

There are 2 cylinders for 268 and so perhaps for 266 too, and tha t is the difference for XP and SE possibly. Open port and closed port.

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HAHA willysmn!! You got that in while I was typing!!! :agree2::agree2: That's what I think too!!

My 266xp is closed transfer....what is the 266se Mossman??

The saw my set-up is off from is a 1985 266SE, says Professional on the side.
The piston is open around the pin and it measures 50mm which is exactly what it says on the bottom of the Mahle cylinder, 50ZN13 W5 to be exact. I am assuming the open piston makes it an open transfer set-up? I have the carb and hardware if you need to make some changes to use this set-up?

Moss

It's a closed transfer set-up........I had to do some brushing up in the tech info department!

You'll have it by midweek next week, enjoy!

Thank you again!!

266 se/xp -> 272

TRI955 said:

What is the difference between the 266 se and 266 xp??

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I think for the most part, SE's had finger ported cylinders and the XP's had closed ports, but I'm sure there was some over lap before they changed the designation. My supposed SE came with closed ports but who knows if someone else was there before me. Also some 266's run the older two piece ignition and some run the one piece ignition like the 268 and 272.

I have both 266's and 272's torn apart, I'll mock up a 272 p/c on a 266 case this weekend and see if you would have to bore the case out. It would be nice if you could throw on an aftermarket 272 p/c. Don't forget to port it first.

272 cyl on 266

I had a saw like this, which had to use the 272 intake system as I remember, but I just bolted the cyl on. I'm interested in what you find out when you mount the 272.

srcarr52 said:

I think for the most part, SE's had finger ported cylinders and the XP's had closed ports, but I'm sure there was some over lap before they changed the designation. My supposed SE came with closed ports but who knows if someone else was there before me. Also some 266's run the older two piece ignition and some run the one piece ignition like the 268 and 272.

I have both 266's and 272's torn apart, I'll mock up a 272 p/c on a 266 case this weekend and see if you would have to bore the case out. It would be nice if you could throw on an aftermarket 272 p/c. Don't forget to port it first.

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I've done this mod, it is a nice upgrade. I did NOT have to bore the case, but I did have to bring over the intake setup. I honestly don't remember how the top cover worked out, but I'd assume the previous posters are correct.

My SE came with a closed transfer setup but, as it was said earlier, you never know who got there before you, and maybe some of them were indeed closed transfer from stock.