How to remove muffler on MS390

[Diesel JD]

Well my warranty is up, so I want to go ahead and set this saw up for muffler mod and richen up the fuel...I'm not sure I know how to get the thing off. The cover...no problem, but the muff itself...who knows. Also what kind of tools would I need? Thanks!
J.D.

 

[skwerl]

A screwdriver and the T-27 Torx wrench that came with your saw.

 

[Kneejerk Bombas]

You'll need this:

 

[Freakingstang]

You'll need this:

nice!

 

[04ultra]

The best wrench..

 

[Lakeside53]

A screwdriver and the T-27 Torx wrench that came with your saw.

I don't think so...

Tough to take off the two nuts of the front with a T27...
Just undo the two M5 nuts... it will then pull off.

 

[Kneejerk Bombas]

My answer solves the problem with which fancy little tool to use. Just beat the crap out of it until it comes off, then bolt on the expansion chamber.

 

[04ultra]

My answer solves the problem with which fancy little tool to use. Just beat the crap out of it until it comes off, then bolt on the expansion chamber.

NO NO just use the smoke wrench .. then you can get a new pro saw..

 

[Lakeside53]

NO NO just use the smoke wrench .. then you can get a new pro saw..

..but you'll melt or smoke up the plastic and then it won't fetch $500 on Ebay, maybe!!

 

[skwerl]

I thought Stihl used those Torx screws on everything? Serves me right for trying to help someone with a question on a homeowner saw.

 

[Lakeside53]

I thought Stihl used those Torx screws on everything? Serves me right for trying to help someone with a question on a homeowner saw.

....and the correct answer was Skwerl's favorite food...

 

[sawinredneck]

I don't think so...

Tough to take off the two nuts of the front with a T27...
Just undo the two M5 nuts... it will then pull off.

Actually, its 3 M5 nuts, not hard at all, and they give you the port size with the indented rectangle on the front of the muffler. Very easy to do.
Andy

 

[Lakeside53]

Actually, its 3 M5 nuts, not hard at all, and they give you the port size with the indented rectangle on the front of the muffler. Very easy to do.

Andy

Damn, so that's where that pile of nuts on the back of my bench comes from!!!

yes, three nuts...

 

[fishhuntcutwood]

You'll need this:

I can always count on Mike for a laugh!

 

[fishhuntcutwood]

I thought Stihl used those Torx screws on everything? Serves me right for trying to help someone with a question on a homeowner saw.

On most things, yes, but the cylinder bolts are standard hex, and I saw a Phillips on my 660 the other day! My 056 is full of slotted head screws! :bang: They'll be changed out in short ordrer with the rebuild.

Jeff

 

[Lakeside53]

On most things, yes, but the cylinder bolts are standard hex, and I saw a Phillips on my 660 the other day! My 056 is full of slotted head screws! :bang: They'll be changed out in short ordrer with the rebuild.

Jeff

Nearly 100% The Cylinder head bolts on the Torx equiped saws are also Torx; all others are Hex, unless that is they have studs and nuts (just a couple).