Author Topic: Husqvarna 266 pistons  (Read 553 times)

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Offline raumato01

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Husqvarna 266 pistons
« on: July 10, 2015, 02:36:18 am »
I have both sorts of cylinders and was wondering if the pistons are the same for both kinds? If they are which cylinder would you use to in a saw you were building?

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Offline Cut4fun

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Re: Husqvarna 266 pistons
« Reply #1 on: July 10, 2015, 12:51:56 pm »
What 2 kinds of 266?    The 266 I had had the full circle piston like this and closed port cylinder.  You talking about 268?





aftermarket 266 piston http://www.hlsproparts.com/Husqvarna-266-piston-and-rings-assembly-p/h31266.htm
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Offline Cut4fun

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Offline raumato01

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Re: Husqvarna 266 pistons
« Reply #3 on: July 10, 2015, 06:09:02 pm »
I thought the xp had a different cylinder and the ad said they were all 266 parts, my mistake .So the open ports are more likely to be 268 cylinders? Should I use those ones instead?

Thanks for the links btw, very useful.

Offline raumato01

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Re: Husqvarna 266 pistons
« Reply #4 on: July 11, 2015, 08:09:39 am »
I typed the serial number into google and it came back as a husqvarna 61 practica. These seem like pretty easy saws to work on, I have two 266s to repair and a 61 white top.

Offline Cut4fun .

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Re: Husqvarna 266 pistons
« Reply #5 on: July 11, 2015, 10:18:31 am »
I dont know the 2 series all that well, even though have owned 254 262 266 268 272 66.
Maybe these guys will chime in as they know them well. @Eccentric @srcarr52
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Offline aclarke

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Re: Husqvarna 266 pistons
« Reply #6 on: July 11, 2015, 11:31:53 am »
The 61's I've worked on had the "slab sided" piston. Adam 

Offline srcarr52

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Re: Husqvarna 266 pistons
« Reply #7 on: July 11, 2015, 11:59:15 am »
The early 266 was an open port and had a full circle non windowed piston like the 61. Then with the closed port cylinder came out on the late 266SE and the 266XP that used the full skirt windowed piston like shown before (similar to the 181 and 2100 thin ring). In the 268XP (same bore as 266) and 272XP (+2mm) they went to the slab sided semi windowed piston we are all used to in modern saws. 

If I were picking up a new piston for a 266 I'd probably use a piston for a 268, I think Meteor makes a nice one.

Offline Eccentric

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Re: Husqvarna 266 pistons
« Reply #8 on: July 11, 2015, 04:07:14 pm »
Meteor makes a nice windowed piston for the closed port 266SE/268XP saws.  They also make a non-windowed piston for the open port saws (such as late 268).  Their terminology is somewhat misleading however.  I've seen where they call the non-windowed piston (which should be used in the open port cylinders) a "closed port" piston.  Also seen where they've called the windowed piston (that should be used in a closed port 266SE/XP or 268XP) an "open port" or "open" piston. 

Various sellers (on ebay and elsewhere) further the confusion with their descriptions of the Meteor pistons.  I have seen the non-windowed piston described as "for closed port cylinders" (which it is NOT the right choice for), and have seen the windowed pistons described as "for open port cylinders" (which it is a poor choice for).  Thankfully, they often will show a picture of the piston that they're selling...............so you can still make an informed decision.  If you have a closed port 266/268 jug then buy the slug that looks like a 272XP piston....
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline Cut4fun .

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Re: Husqvarna 266 pistons
« Reply #9 on: July 12, 2015, 12:29:43 pm »
The early 266 was an open port and had a full circle non windowed piston like the 61. Then with the closed port cylinder came out on the late 266SE and the 266XP that used the full skirt windowed piston like shown before (similar to the 181 and 2100 thin ring). In the 268XP (same bore as 266) and 272XP (+2mm) they went to the slab sided semi windowed piston we are all used to in modern saws. 

If I were picking up a new piston for a 266 I'd probably use a piston for a 268, I think Meteor makes a nice one.

Meteor makes a nice windowed piston for the closed port 266SE/268XP saws.  They also make a non-windowed piston for the open port saws (such as late 268).  Their terminology is somewhat misleading however.  I've seen where they call the non-windowed piston (which should be used in the open port cylinders) a "closed port" piston.  Also seen where they've called the windowed piston (that should be used in a closed port 266SE/XP or 268XP) an "open port" or "open" piston. 

Various sellers (on ebay and elsewhere) further the confusion with their descriptions of the Meteor pistons.  I have seen the non-windowed piston described as "for closed port cylinders" (which it is NOT the right choice for), and have seen the windowed pistons described as "for open port cylinders" (which it is a poor choice for).  Thankfully, they often will show a picture of the piston that they're selling...............so you can still make an informed decision.  If you have a closed port 266/268 jug then buy the slug that looks like a 272XP piston....

Never knew there was a early open 266. Thanks for the teaching guys.
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