MS261c Muffler Mod

[Garrett_261]

Hello,

Brand new member to the site, and wanted to post up some pictures of a muffler mod i did to my own personal MS261. I read through many threads on forums, including this one, prior to even attempting the work. First I removed the spark arrestor screen. Then roughly doubled the size of the factory exhaust after the location where the screen was.

I had initially planned on leaving it this way, but after doing more research into screen vs no screen, and the possibility of dust/chips/insects getting into the cylinder via exhaust port, I decided to make a new "screen". Using 16 GA stainless steel perforated sheet, 5/32" holes on 3/16" centers - i hand cut a piece and secured it outward of the newly enlarged exit. The new "screen" has a rough open area of 60%, which should be at between 33-50% better than stock.

Last picture is of some work I did for the winter's firewood, prior to any mod. 2-18" trunks, 36" overall. with my MS261 with 20" bar.
Comments, thoughts?

 

[hedge hog]

Good job !!!!!!!
I have a series 1 but let the screen out because it stays in a Stihl carrying case.
But the 20” bar is easy on the back!!!!!


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[Garrett_261]

Good job !!!!!!!
I have a series 1 but let the screen out because it stays in a Stihl carrying case.
But the 20” bar is easy on the back!!!!!


Sent from my iPhone using Tapatalk

Thanks!! Ive seen where people say the 261 is "better" with an 18" bar, but my 20 rips through everything!

 

[hedge hog]

It sure does
I cut only Hedge with RM chain and rakers set at .32 thousand and don’t look back!



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[Andyshine77]

Nice-looking Muffler mod! The 261 is a cutting machine.

 

[1Alpha1]

How much louder is it?

 

[Garrett_261]

When it was without the screen she was definitely louder, but bearable. I'll have to test it with the screen on tonight or tomorrow!

 

[Steelz]

Thanks!! Ive seen where people say the 261 is "better" with an 18" bar, but my 20 rips through everything!

I haven’t used my MS260 in quite awhile but I ordered it new with 20” bar and chain. It cut through everything I used it on. White and Red Oak. Sweet Gum. And Maple Great choice with 20” Good looking Mod


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[lambs]

I assume you guys are running 18-20" .325 pitch.

 

[Garrett_261]

I haven’t used my MS260 in quite awhile but I ordered it new with 20” bar and chain. It cut through everything I used it on. White and Red Oak. Sweet Gum. And Maple Great choice with 20” Good looking Mod


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Thanks! I appreciate it!

I assume you guys are running 18-20" .325 pitch.

Yeah .325 pitch 20".