Last night I removed the catalyst from the muffler on a 359. Everything I have read says that most normal people replace them with non EPA muffs but if anybody wants to know how to do it or just wants to know if it can be done, it can.
Muffler mod on Husq 359 with catalyst
- Thread starter pelhamjeff
- Start date
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Well I started punching it out from the port side with a hammer and punch but wound up prying it out part of the way. The metal straightens easy and then you just tack it all the way around. It was probably 100-150 tacs. Even on lowest voltage setting, my welder would burn thru if you tried to weld a bead.
For the $15 to $20. a non EPA muffler costs is it really worth the hassel of cutting one open? I have used several hollow mufflers bought off eBay, they work and have lasted for more than 5 years since building and fixing the 359`s up.
It's probably not worth the hassle for the average person. I was bored and just wanted to see if I could do it. I saw the $20 ones on ebay but damn I get impatient!
cuinrearview
Red saw lover
I just bypass the cat.
I picture yours being so loud you would need earplugs
What do you mean; arnt mufflers just spark catchers? [emoji39]
I did this... not that loud at all. Sounds really good.
Huskybill
Addicted to ArboristSite
I’m planning to mod mufflers but removing that center divider and replacing it with a stainless mesh. I need an excuse to buy a 110 MiG welder.
Fired up my 353 the other day. Found out that little saw is loud stock.
Fired up my 353 the other day. Found out that little saw is loud stock.
beaglebriar
ArboristSite Operative
Pearl necklace?I did this... not that loud at all. Sounds really good.
You need one....?
beaglebriar
ArboristSite Operative
Pass
[emoji1787][emoji28][emoji1787]
I wear good ear plugs so I'm not that concerned with the noise.
Here is the first test of the muffler.
I can't tellI did this... not that loud at all. Sounds really good.
If I'm looking at it right, you drilled thru the catalyst, right? I'm wondering if it still gets as hot after your mod. I get that it's not restrictive any more but is it still making heat like it did before the mod?I did this... not that loud at all. Sounds really good.
