Any harm in running a saw with CAT CONVERTER and restrictive muffler?

[banditt007]

Just wondering if there is any engine harm (aside from reduced performance) from running a saw with the OEM cat converter and restrictive muffler? Assuming of course that the carb is tuned/good fuel mix/ect.

 

[Jacob J.]

If you're talking about a stock saw that came with a catalytic muffler, yes they run all day long with them.

The catalytic muffler is not a converter per se' (not that a catalytic converter on a car is a really a converter either.)

The catalytic muffler in a saw is simply a muffler with a metal baffle inside covered with a catalyst, which heats up when
exposed to exhaust gases exiting the engine and further oxidizes and promotes consumption of unburned hydrocarbons.

I guess it is a "converter" in a loose sense of the word. Fish will be along soon to beat us all over the head with loaf of French bread.

 

[Chris-PA]

Assuming it's tuned OK it shouldn't cause any harm, as long as it doesn't damage anything from heat. My Dad's 455e Rancher has one and seems to be holding up fine.

 

[banditt007]

Anyone else have long term experience running these restrictive mufflers? I don't know how soon it'll be until i can modify it, and until then, i dont want it harming the saw. A lack of performance is fine for the time being though...

 

[TreeTangler]

It will be absolutely fine as long as the carb is adjusted fine, more importantly as long as it's not too lean. Although you'd never know it from this site, I'd dare say that the vast majority of saws out there cutting firewood right now have never seen a modification of any type.

 

[CTYank]

Anyone else have long term experience running these restrictive mufflers? I don't know how soon it'll be until i can modify it, and until then, i dont want it harming the saw. A lack of performance is fine for the time being though...

Religious beliefs of some here don't allow running stock exhausts, because of the alleged "lack of performance." (Of course, they don't breathe much air themselves.) Might be a problem if you're running seriously rich, or are spitting out oil from excessive lube in the mix; that'll heat it up.

I've yet to hear mention of actual power curve from a dyno run, so we'll have to accept peak power tales. Disclaimer: quieter = better. Music-lover here.

 

[albert]

What happens if it's too rich? On most other engines the cat will get hotter. You will most likely get more hours out of a saw without one comparing the same model, all else being equal.

 

[blsnelling]

Religious beliefs of some here don't allow running stock exhausts, because of the alleged "lack of performance." (Of course, they don't breathe much air themselves.) Might be a problem if you're running seriously rich, or are spitting out oil from excessive lube in the mix; that'll heat it up.

I've yet to hear mention of actual power curve from a dyno run, so we'll have to accept peak power tales. Disclaimer: quieter = better. Music-lover here.

Yup. It's against my religion to run stock mufflers. A cat muffler would be an unpardonable sin!!!!!!!!!!!

 

[naturelover]

Well, kinda like how quiet my Quake is.

And had the 441 out and was cutting in a stash of piled up dead with a buddy, and had to put ear plugs in. Stock muff too.

He said "next time, leave that dam saw at the house!"

"But look how well it cuts!" said I




Sent from my iPhone 5 using Tapatalk

 

[makguy]

The cat mufflers run hotter than a standar exhaust, and if you combine it with a lean running condition you can have issues, and damage the saw.

 

[TK]

Assuming it's tuned OK it shouldn't cause any harm, as long as it doesn't damage anything from heat. My Dad's 455e Rancher has one and seems to be holding up fine.

To my knowledge none of the 4 series saws have cat mufflers.