Husky 350 Muffler mod question

[sawjo]

I have a Husky 350 thats a few years old but only has a few hours on it. Its doesn't look like a cat muffler, is it beneficial to mod this muffler for heat and peformance reasons (with carb adjust) or should I leave it alone. It doesn't seem to be too restricted. The saw could be >5 years old, it says 52cc on the case.

<img src="http://www.MyEasyPics.com/is.php?i=409509&img=Husky350_muffler_004.JPG" border="0">

 

[Dubai Vol]

I'm hardly the chainsaw expert, but I can tell you where I would start

1. Get a tach. Not only does it take the guesswork out of tuning, but it will show you what works., and how well.

2. Once you have your tach, the first thing I would suggest is to pull the spark arrestor screen and see how many revs you pick up. You may be surprised: that screen is a substantial flow restriction all by itself. In fact I suggest richening the mixture and bringing the revs down below max BEFORE pulling the screen. That gives you room to play with before you over-rev the engine.

Also, I'm not saying you should remove the screen permanently. Whether to do that is a matter of what's legal and how brave you feel, fire-prevention-wise. The purpose in removing the screen for testing is to get a baseline and establish some "feel" for what the saw responds to when you open up the muffler.

SO once you've see how much gan is to be had by pulling the screen, you can put it back in and see what to do about getting that gain back by modifying the muffler in other ways. I'll let the real experts chime in on the best ways to do that. Just keep in mind that more is not always better: cut too much and you can actually lose power.

 

[metalli445]

I want to buy a husky 350 and was curious about the muffler mod also.

 

[TheLazyBFarm]

I just bought a 350, so I'm interested also.

Thanks,

Al

 

[trimmmed]

....... or should I leave it alone.

Yes, leave it alone. That might not be popular with tim allen fans but that is how my 350 sits, simply stock.

 

[16:1mix]

I just bought a 350, so I'm interested also.

Thanks,

Al

I have a 350 and you guys are tempting me!!

 

[PAF]

..

I got a 2150...same saw but in Jonsered...and dont have any restriction in the muffler...I remove the spark arrestor that it...and I tune it at 12 500-12 700 rpm...it run good

 

[excess650]

Any of you contemplating a mod on a 350 might want to take a look at this :jawdrop: http://cgi.ebay.com/husqvarna-350-s...ryZ85915QQssPageNameZWDVWQQrdZ1QQcmdZViewItem :taped:

 

[arlen]

I have a Husky 350 thats a few years old but only has a few hours on it. Its doesn't look like a cat muffler, is it beneficial to mod this muffler for heat and peformance reasons (with carb adjust) or should I leave it alone. It doesn't seem to be too restricted. The saw could be >5 years old, it says 52cc on the case.

<img src="http://www.MyEasyPics.com/is.php?i=409509&img=Husky350_muffler_004.JPG" border="0">

I have a Husky 350 a few years old. I was given advice to get rid of the 20" bar that came with the saw and go with a 16". I installed a 16" bar and full chizzle chain form baileys and I am a lot happier with the saw. I will probably order a rim sproket kit for it for about $20 bucks. If muffler mods make saws loder I won't be able to run the saw at my home. David:monkey:

 

[seagull369]

Unless you really know what youre doing, making any 'mod' to an existing muffler on a 2 stroke engine will most likely result in a performance LOSS.

Most mufflers/ tuned pipes on (garden variety) 2 cycle engines are built in a way to create high pressure shockwave during operation. This wave helps minimize the motor's inherent inefficiency by pushing unburnt fuel that is exiting the exhaust port, back into the chamber to combust. Without this, the fuel would continue on out the exhaust port and be wasted and performance would suffer.

It's tempting to treat (again, a garden variety) a 2 stroke like a 4 stroke and assume freeing up the exhaust can only help performance, but in reality that isn't the case.

There are other variations on the 2 cycle design (direct injection found on some newer marine outboards, for one) where this shockwave probably wouldn't be needed, but they due to the complexity and cost you probably won't be seeing 'em on anything like a chainsaw anytime soon.

 

[chainsaw1]

Unless you really know what youre doing, making any 'mod' to an existing muffler on a 2 stroke engine will most likely result in a performance LOSS.

Most mufflers/ tuned pipes on (garden variety) 2 cycle engines are built in a way to create high pressure shockwave during operation. This wave helps minimize the motor's inherent inefficiency by pushing unburnt fuel that is exiting the exhaust port, back into the chamber to combust. Without this, the fuel would continue on out the exhaust port and be wasted and performance would suffer.

It's tempting to treat (again, a garden variety) a 2 stroke like a 4 stroke and assume freeing up the exhaust can only help performance, but in reality that isn't the case.

There are other variations on the 2 cycle design (direct injection found on some newer marine outboards, for one) where this shockwave probably wouldn't be needed, but they due to the complexity and cost you probably won't be seeing 'em on anything like a chainsaw anytime soon.

 

[chainsaw1]

It is the single best gain in performance that you can do to a chainsaw.

 

[woodyman]

Do the muffler mod and readjust the carb with a tach,you will like it.Cheapest mod you can do,more power,better throttle response,runs cooler,and saw should last as long or longer than stock.

 

[funky sawman]

What kind of crack is this gut smoken--- man it must be GOOD

 

[funky sawman]

Unless you really know what youre doing, making any 'mod' to an existing muffler on a 2 stroke engine will most likely result in a performance LOSS.

Most mufflers/ tuned pipes on (garden variety) 2 cycle engines are built in a way to create high pressure shockwave during operation. This wave helps minimize the motor's inherent inefficiency by pushing unburnt fuel that is exiting the exhaust port, back into the chamber to combust. Without this, the fuel would continue on out the exhaust port and be wasted and performance would suffer.

It's tempting to treat (again, a garden variety) a 2 stroke like a 4 stroke and assume freeing up the exhaust can only help performance, but in reality that isn't the case.

There are other variations on the 2 cycle design (direct injection found on some newer marine outboards, for one) where this shockwave probably wouldn't be needed, but they due to the complexity and cost you probably won't be seeing 'em on anything like a chainsaw anytime soon.

The only reason the new saws have small exhaust is for epa--- OH yea what about the factory dual port stihls that ran awsome, hunh??????????????

 

[funky sawman]

Unless you really know what youre doing, making any 'mod' to an existing muffler on a 2 stroke engine will most likely result in a performance LOSS.

Most mufflers/ tuned pipes on (garden variety) 2 cycle engines are built in a way to create high pressure shockwave during operation. This wave helps minimize the motor's inherent inefficiency by pushing unburnt fuel that is exiting the exhaust port, back into the chamber to combust. Without this, the fuel would continue on out the exhaust port and be wasted and performance would suffer.

It's tempting to treat (again, a garden variety) a 2 stroke like a 4 stroke and assume freeing up the exhaust can only help performance, but in reality that isn't the case.

There are other variations on the 2 cycle design (direct injection found on some newer marine outboards, for one) where this shockwave probably wouldn't be needed, but they due to the complexity and cost you probably won't be seeing 'em on anything like a chainsaw anytime soon.

I want what your on (crack)

 

[2000ssm6]

The only reason the new saws have small exhaust is for epa--- OH yea what about the factory dual port stihls that ran awsome, hunh??????????????

Yup, the epa and sound requirements keep the holes tiny. And another yup on the dual port Stihls, they do run good.