261C m-tronic catless muffler

[Beardy]

I have a recent 261C and the muffler gets almighty hot after any kind of extended use. It's under warranty and I don't want to hack it about, (yet). Can anyone point me towards another cat less muffler, perhaps from a previous generation, that bolts on that I could substitute to enable it to run a bit cooler?
If Stihl are happy with running the saw that hot, perhaps I shouldn't worry but I'd hate to get through the warranty period only to have it fail soon after due to this EPA mandated restriction.
thanks
Beardy

 

[Volund]

Oh w-hell... the muffler is getting hot now... what has it become with combustion engines these days...

 

[82F100SWB]

I'm pretty sure the 261 muffler is pretty much just an empty can unless something has changed very recently. No cat as far as I am aware.

 

[huskihl]

Some have a tube up in the top. Some are empty. Haven’t seen one with a cat yet.
Stuff gets hot with 1500°f heat blowing on it

 

[SAWMIKAZE]

All the version 2's are an empty can.

The older ones just had a tube that killed performance.

 

[drf255]

Just add a small deflector, or some louvers, to the flywheel side front forward or the crimped seem. You’ll be happy.

Just make sure you flush the whole can out good afterwards so there’s no metal left in it.

 

[John Lyngdal]

All the version 2's are an empty can.

The older ones just had a tube that killed performance.

That's good to know. I have a non-M 261 that doesn't keep up with my 346XP.
I was planning on modifying the muffler to remove the tube, but installing a Version 2 muffler would be even easier.

 

[Ronaldo]

That's good to know. I have a non-M 261 that doesn't keep up with my 346XP.
I was planning on modifying the muffler to remove the tube, but installing a Version 2 muffler would be even easier.

Even with that it likely won't keep up with a 346.

Sent from my SM-G930VL using Tapatalk

 

[EchoRomeoCharlie]

Never seen a cat in a 261 muffler

Mufflers do get hot...regardless of cats...so..

 

[Fatherwheels]

Well someone has to ask, what oil ratio are you using.

 

[PV Hiker]

Winter grade fuel on a hot day?

 

[Fatherwheels]

I have a recent 261C and the muffler gets almighty hot after any kind of extended use. It's under warranty and I don't want to hack it about, (yet). Can anyone point me towards another cat less muffler, perhaps from a previous generation, that bolts on that I could substitute to enable it to run a bit cooler?
If Stihl are happy with running the saw that hot, perhaps I shouldn't worry but I'd hate to get through the warranty period only to have it fail soon after due to this EPA mandated restriction.
thanks
Beardy

Buy an aftermarket muffler and mod it, well worth it for peace of mind, the less restrictions the better to a point,
and you will at least be sure its not a restricted muffler problem if the heat doesn't die down a bit after the mod.

 

[Fatherwheels]

This guy modded his muffler, he also talks of re calibrating the saw, may be a re calibration would
help your saw find its tune, did it run out of fuel at any time.

 

[Beardy]

Thanks for the attention. I had assumed there was a cat in the muffler and it looks like I was wrong.
cheers

 

[SAWMIKAZE]

Even with that it likely won't keep up with a 346.

Sent from my SM-G930VL using Tapatalk

I used to think that, I was wrong.

 

[John Lyngdal]

Pulled the muffler on my 261C today and looked inside. I only saw the pair of tubes for the muffler to cylinder screws and a defector for the exhaust port.
I take this to mean that I have the "open" version of the muffler.

 

[bigbadbob]

Pulled the muffler on my 261C today and looked inside. I only saw the pair of tubes for the muffler to cylinder screws and a defector for the exhaust port.
I take this to mean that I have the "open" version of the muffler.

Same here

 

[dmb2613]

Make a plate out of copper to go between the cylinder and the muffler it will disburse a lot of heat

 

[huskihl]

Pulled the muffler on my 261C today and looked inside. I only saw the pair of tubes for the muffler to cylinder screws and a defector for the exhaust port.
I take this to mean that I have the "open" version of the muffler.

Same here

The tube can be hard to see. It’s kind of buried right up there in the top back corner

 

[bigbadbob]

I looked in my muff,, once you pull the screen out you can shine a lite and there is nothing blocking it, you can use a hook/probe and feel it it opened up in that tube.
Im probably gonna slice the side open with slots.
Awaiting a slug from italy.
Lotsa hours on the saw, but it pretty clean. Comp was a lil under 150 and a little carbon score.
No complaints on a free saw with B/C