261 Question

[treeclimber1990]

My name is George, I’m new to the forum. I have a Stihl ms 261 with the adjustable carb. I ordered a tsumara light bar 18” for my saw and got the 3/8 chain to fit the bar. And of course my saw is not 3/8 it’s .325. So I ordered the 3/8 sprocket kit from stihl. Is that all that is needed to switch to 3/8 from .325? Also I ordered a Egan exhaust, when I put the exhaust on am I going to need to adjust carb? I put an Egan on my echo 355t and it seemed to run fine without adjusting the carb? Any input would be appreciated!!
Best Wishes

 

[2StrokeFondler]

My name is George, I’m new to the forum. I have a Stihl ms 261 with the adjustable carb. I ordered a tsumara light bar 18” for my saw and got the 3/8 chain to fit the bar. And of course my saw is not 3/8 it’s .325. So I ordered the 3/8 sprocket kit from stihl. Is that all that is needed to switch to 3/8 from .325? Also I ordered a Egan exhaust, when I put the exhaust on am I going to need to adjust carb? I put an Egan on my echo 355t and it seemed to run fine without adjusting the carb? Any input would be appreciated!!
Best Wishes

Yes, that should be all you need. Bar, chain and sprocket must match.
Also yes: you should adjust the carb. Vintage engine repairs has good info on YouTube on how to do it. Maybe invest in a tach, the cheap ones from fleebay or Amazon are good enough.

 

[treeclimber1990]

Appreciate it

 

[singinwoodwackr]

To go from .325 to 3/8 you must swap out the rim sprocket as well as with either entire bar or swap the tip to 3/8.

 

[RCamo]

My name is George, I’m new to the forum. I have a Stihl ms 261 with the adjustable carb. I ordered a tsumara light bar 18” for my saw and got the 3/8 chain to fit the bar. And of course my saw is not 3/8 it’s .325. So I ordered the 3/8 sprocket kit from stihl. Is that all that is needed to switch to 3/8 from .325? Also I ordered a Egan exhaust, when I put the exhaust on am I going to need to adjust carb? I put an Egan on my echo 355t and it seemed to run fine without adjusting the carb? Any input would be appreciated!!
Best Wishes

I'm assuming you bought the Egan Performance “header pipe" for your 261, I put one on mine and like it so far (wear ear plugs!). I found that I had to make fairly big adjustments to the carb on mine to get it right. I also bought a modded muffler from them for my 026 but the adjustments were less than for the 261. If you don't have a tach I highly suggest getting one, it makes things much easier and more accurate than going by 'ear'. They're not very expensive and it definitely makes carb adjustment quicker.

 

[treeclimber1990]

Yeah i bought the Egan exhaust for the 261. I was very impressed with the Egan on my 355t, a noticeable difference for sure.