STIHL The Official Stihl Chainsaws Thread

[Sloughfoot]

Should be the 021/23/25 ms 250 carb that you used to make a ms 170-180 adjustable

Made me look. It's a Walbro WT215 off an 021.

 

[Sloughfoot]

On that 026 do the ring gaps face towards the intake or exhaust?

intake on mine.

 

[hacskaroly]

On that 026 do the ring gaps face towards the intake or exhaust?

Should be towards the intake, here is a pic from the IPL that shows orientation:

 

[lehman live edge slab]

Is it a 180 or 181? The 170-180 is not a stratto saw but I’m pretty sure the 171/181/211 are and I also recall my 171 having a full adjustable carb on it because I muffler modified and added some timing to it.

 

[hacskaroly]

Made me look. It's a Walbro WT215 off an 021.

Ok, so an early MS 210...good to know!!

 

[hacskaroly]

The 170-180 is not a stratto saw but I’m pretty sure the 171/181/211 are and I also recall my 171 having a full adjustable carb on it because I muffler modified and added some timing to it.

Yeah, I thought if I ever got a MS 170, one of the first things I would do would be to put an adjustable carb and a side mount tensioner on it!!

 

[Sloughfoot]

Is it a 180 or 181? The 170-180 is not a stratto saw but I’m pretty sure the 171/181/211 are and I also recall my 171 having a full adjustable carb on it because I muffler modified and added some timing to it.

It's a 180.

 

[Sloughfoot]

Yeah, I thought if I ever got a MS 170, one of the first things I would do would be to put an adjustable carb and a side mount tensioner on it!!

I did that to this one, advanced the timing and opened up the muffler a little too. Made it a fun little saw.

 

[SawAddictedFarmer]

intake on mine.

Thanks!

Should be towards the intake, here is a pic from the IPL that shows orientation:

View attachment 470773

Thanks!

 

[lehman live edge slab]

Thanks!

Thanks!

I can’t think of any Stihl saws off the top of my head that don’t have ring gaps towards intake side, doesn’t mean that there isn’t but if you had to guess odds are intake side is the way to go.

 

[hacskaroly]

I did that to this one, advanced the timing and opened up the muffler a little too. Made it a fun little saw.

If you really want to have fun, drop an 8" 33 DL Milwaukee bar on it - no modifications needed, mates right up. I took scrap chain we had and made a 33 DL 3/8p .043 full skip chain for it.

 

[hacskaroly]

I can’t think of any Stihl saws off the top of my head that don’t have ring gaps towards intake side, doesn’t mean that there isn’t but if you had to guess odds are intake side is the way to go.

I know some older saws (I think McCulloch) had some with floating rings where there was no pin to keep the ring from spinning. From what I understand the ring gaps aren't on the exhaust side to prevent them from getting caught in the exhaust port and sheering off. Also, it could provide a slight air gap correct?

 

[Sloughfoot]

I can’t think of any Stihl saws off the top of my head that don’t have ring gaps towards intake side, doesn’t mean that there isn’t but if you had to guess odds are intake side is the way to go.

Made me look again. The 044 piston I took off has them on the exhaust side.

 

[hacskaroly]

The 044 piston I took off has them on the exhaust side.

I wonder if it was on backwards, the IPL shows intake side on the 044 (if that is accurate or just Stihl copy and pasting from other diagrams):

 

[Sloughfoot]

I know some older saws (I think McCulloch) had some with floating rings where there was no pin to keep the ring from spinning. From what I understand the ring gaps aren't on the exhaust side to prevent them from getting caught in the exhaust port and sheering off. Also, it could provide a slight air gap correct?

Yeh, no pins on my one Mac 10-10. It's why you've gotta leave the little divider in the exhaust port.

 

[lehman live edge slab]

Made me look again. The 044 piston I took off has them on the exhaust side.

Piston was in backwards, which sometimes is done if you need clearance for finger ports ect long as it won’t hook the exhaust port or transfers.

 

[lehman live edge slab]

I wonder if it was on backwards, the IPL shows intake side on the 044 (if that is accurate or just Stihl copy and pasting from other diagrams):
View attachment 470775

Arrow towards exhaust on meteor piston

 

[Sloughfoot]

I wonder if it was on backwards, the IPL shows intake side on the 044 (if that is accurate or just Stihl copy and pasting from other diagrams):
View attachment 470775

The arrow points toward them on mine. It points at the scoring I remember being on that side too. Funny this came up. Just yesterday I had an "Oh shoot" moment after I'd taken the top down on a piston and hadn't marked the arrow. Had noticed beforehand it was factory on the exhaust side and polished a little on the bottom of the intake side and went by that. Coulda gone by the pin location, but maybe not.

 

[Mad Professor]

On that 026 do the ring gaps face towards the intake or exhaust?

Most pistons will have an arrow pointing towards the ex port.

You don't want the ring gaps to run over a port.

 

[Sloughfoot]

Remembered I've got a new 044 piston. Arrows are on the intake side on it. Look to be on the exhaust side on this new one on Ebay

Stihl OEM 044 Piston & Cylinder 50mm Wrist Pin 12mm MS440 1128-020-1227 #GM-E5A1 | eBay

This is a Stihl OEM 044 / MS440. Piston & Cylinder Kit.

www.ebay.com