Husky 141 muffler mod WOW!

[kodiakfisher]

I just purchased a Husky 141 for $80 dollars and adjusted the carb and it just didn't sound right. Found another post about the pencil sized eraser outlet for the exhaust so I drilled that out and on the lower left and right corners punched eight small holes to allow the saw to breath. I can put my hand in front of the holes and there is definately exhaust comming out of the holes.

The biggest surprise was that I had to turn the H side jet almost 1/4 turn to get it to four stroke. There is more power for sure now. Now that I think about it, the saw was having a little trouble comming down off full throttle it would die. I adjusted the idle screw but I probably should have adjusted the L speed jet a little richer instead of changing the idle screw. I will fix that later today.


Kodiakfisher

 

[scottr]

Cat Muffler

kodiakfisher , when you drilled out the pencil eraser sized hole did you see a tube inside ? Maxs' picture http://www.arboristsite.com/attachment_27167.php looks like there's three spot welds around that small outlet .

 

[Lawn Masters]

thats surprising a saw will even cut with that little hole for ehxaust gases.

 

[bugfart]

I think you over-compensated with 1/4 turn on the H.
You should have realized a cooler running saw with half that adjustment. More exhaust flow means it can expell more raw fuel to cool the saw. Any gain is a gain, don't out-smart yourself now...

 

[kodiakfisher]

Scottr,

yes there was a very tighly woven screen tack welded inside I didn't notice a tube didn't really care. I drilled out the hole large enough to reach in there with tweezers and pull out the screen. I wouldn't worry about sparks...if you pull the muffler off you can see how difficult it would be for a spark to bounce around all the turns and out the hole due to the internal baffles. I took a pointed scribe and just tapped holes in the lower left and right corners, about 8 in each corner on the front. I didn't split my muffler due to it not being pressed together it seems one side was peened (bent) around the other making gutting the muffler impossible

 

[Lawn Masters]

I've gutted mufflers assembled in the manner you describe, its not easy ,but I know it is possible.

 

[scottr]

Cat Muffler

kodiakfisher , it looks like you could drill a decent size hole inside the spot weld area and if that wasn't enough a dremmel with a stone could cut more . So what does it sound like now ?

 

[kodiakfisher]

to be honest I wear ear protection so I didn't notice any difference but both of my other saw are bigger and louder by design :blob5:

When I say tapped holes in the lower left and right corners I was referring to the front of the muffler.


Kodiakfisher

 

[Max]

Sounds like you did a good job.
If anyone else has a cat cvntr 141 you can just drill out the dead center front area behind the triangular plate. This creates a straight shot through the open center of the cat cnvtr system and bypasses all the internal crap.
I had a picture of that in the other 141 tread from a day or two ago.

What I would really suggest is to get a stock non cat open can muffler and open the factory slot some more. There is also a picture of that in the other thread. This will help acceleration and give a tad more power while running much cooler than the modded cat muffler. I modded both designs and the cat cnvtr muffler still runs way to hot even with the front mods. JMO.

I know its just a 141, but it sure helped it out.

I forgot...if you go to the open can/black muffler you need to get the rear heat shield and install that also.

 

[kodiakfisher]

Max,

Thanks for the tip, if I need more power I will just pick up my 357xp or if I feel like picking up an old friend I will use my Mac 4900 (see 4900 rebuild thread).

I just wanted to have a small saw that I could put on the front of my ATV that I could tune to last more than 2 years. Also if the saw walks off then I'm only out $80 see(Husky 141 $80 thread).

To be honest I didn't think the Mac 4900 rebuild was going to work, it was my first rebuild and it came out great. I don't know why I doubted I could do I used to be a mechanic. It did get me a nice little used saw though.


Kodiakfisher

 

[andrethegiant70]

Hi! I have a Husky 41 (I understand its pretty much the same saw) and it would be nice to get it to breath a little better. Anyone know if the mufflers are the same? Also, the little eraser-sized hole in the picture..... is that the exhaust outlet? I can't quite figure out what I'm looking at. Thanks!

 

[Max]

The picture I posted does indeed show the exhaust hole on a 141 silver
cat cnvtr muffler. Not one of Husky's/Poulans better ideas or design.
I put the pencil eraser there for a size comparison.

 

[scottr]

Non Cat 141 Muffler

Andrethegiant70 , did you see Maxs' picture of his non cat 141 muffler ? http://www.arboristsite.com/attachment_27169.php

 

[Max]

Thanks Scottr
I'm still learning the cmptr thing...

 

[thesupernova86]

Hey ive got a 41 husky that i want to up the power on... but i havent ever modified a saw befor.. only cars...n theres a big difference...any tips on a good first mod? dont quite get the moffler idea yet..so some help her would be great.

 

[lostone]

The Husky 41 I had did not have a muffler like the one in the photo, the exhaust port (slit in the muffler that was opened out to form a diverter) that came out the side and angled forward, I just put a wide flat screw driver in the slot and twisted it to open it up some on the one I had.

 

[WESCOMAN]

Husqvarna 455 Rancher muffler mod ideas needed.

Hi guys,
I need some ideas on how to modify my muffler. Its a new saw but up at 7500 feet I know it could use a little help. Anyone doing or done a muffler mod? Anyone selling a better muffler? Thanks.

 

[kodiakfisher]

I just took a small punch and put a couple of holes in each lower corner of the muffler and drilled out the outlet port larger and removed the very restrictive screen covering the exhaust outlet port.


Kodiakfisher