New Husqvarna. . 365 special! ! Before and After muff mod

After returning home from our trip to my In-laws (1.5 hours one way) at 7:30pm. I didn't think I'd get the time to run the 365 and do a muff mod before dark..

But.... Because my 390 already has the same muff mod? I ran the 365, then swapped mufflers from the 390xp...


Once I finally got back to the basement after the test? I completed the muff mod on the 365.. I open up under the deflector as much as I can, then make the rectangular cut out in the front.. Same exact set up on the 390xp.

Saw was retuned after putting new muffler on.. Both runs were at 13,000 rpms. The muff mod allowed for more RPM, but to keep it on a level playing field, it was kept the same.

The all stock saw was about 5 seconds (some a little over) and muff mod was about 4 seconds (some a little over). So a 1 second reduction is about a 20% gain.. All in about 25 minutes worth of work (opening under deflector, making new rectangular hole, and cutting new screen). Man does it sound and run better (feels faster than what the time states)!!

I do have a new aftermarket muffler that will probably end up on the 390 or 365. It has a small pipe in the front corner, rather than the top outlet with deflector.. I'm thinking that pipe should sound pretty good Plus it keeps that heat from melting the top shroud.

Stock saw


Muff mod

 

Saw was retuned... It's in the post (twice) that you quoted. First time was that it was retuned, 2nd was I put it right back at 13,000 rpm..

I also stated it could probably be faster.. But I kept them on even playing fields..

Quoting is helpful.. If read first lol

 

Thanks bud.. Brand new 20" RS chain and did both tests within a hour hour so temp, humidity, etc was the same.. As well as tune and RPM noted above

 

It sounds good higher than 13,000.. But wanted to keep it fair.

20% is still a good gain for just a muff mod!!! I'm happy with it and it sounds so much better!!

 

These Husq benefit a lot from air alone!!

That front port has been said to be a bark burner. If it cuts fast enough? It won't burn bark.. Also, maybe that was the only outlet in those saws? If yiu have 2 or 3 outlets? Not much air will be coming out of it.

I've seen way to many work saws with mods like this now. It's a must have in my book.

 

This saw probably won't see much 20" stuff.. By next winter, it will only see 6"-10" stuff

My 390xp may see some bigger stuff.. I'll be sure to report back.

If it cuts fast enough (fast saw/sharp chain), the muff shouldn't sit in the same spot that long to burn bark.

Not saying it won't happen or hasn't happened. Just seems as though the saw would have sit there for an extended period of time.

 

For the small wood I'll be cutting, it should be fine.. But as stated above.. I've seen A LOT OF work saws done like this.

But.... To add to this, almost all builders use some sort of deflector that points straight out of the front. So whether it comes from the front of the can, or the side (pointed right out the front)? It's shooting forward.

I should've clarified that. The wood up here isn't big. At least the little I cut. Heck, I haven't needed longer than a 20" bar in forever. The last time I needed a big bar, was this..

And I had help.. I was running my 036 Pro with 25" and a buddy had a 440 with 28".

If I'm cutting that big of wood?? Wait? I wont... After the load you seen above? I stick to under 20". When bucked to 18"-20" lengths, a 20" diameter piece of wood is heavy.. With no log lift? I'm so good.. I'd stop burning wood if I had to cut 60" DBH wood.