Stihl MS441 Muffler Mod - Screen intact

You guys might remember I posted a couple of the differences between a standard MS441 and the newer M-tronic version a couple weeks back.

http://firewoodhoardersclub.com/forums/index.php?threads/ms441-muffler-oe-vs-m.3172/

One of the biggest differences was the exhaust outlet on the muffler was significantly smaller on the OE 441. Well, while working on this one, a muffler mod was one of the things it was here to get done.

These mufflers are just empty cans stock, no baffles. So that makes modding them a simple matter of opening up the existing opening or adding another exit port.

Here is the stock muffler opening:


And here is where we are at currently:




The saw showed a mild improvement in power, nothing to write home about but it's about what I expected given how uncluttered these mufflers are already.

And yes, there is video. Still have to edit/upload it however and that takes time. I ran it stock, with the mod and with the mod plus the screen removed.

 

That's got to be a decent improvement over stock. There is room for more, but if you have to leave the screen, then that will do, plenty good.

Here is my 441C (modded)





And here is my new 362C (stock) And definitely need to do something about it

 

That surprises me, you being a forester and all.

 

Heh, even tho I keep the screens on mine if possible, my "work" saws rarely sit long enough for anything to make a home in them.

They also hang out in the garage/shop with me and even my wife won't stay in there for long......

 

You haven't seen the back of my trucks have you?

And the saw rides in the cab unless it leaks.

 

That's usually the case. Especially if I bring the big truck. If' I'm buying the fuel, the trip is gonna be worth it.