Stihl 056 Muffler Vibration Embrittlement

[Vintage Engine Repairs]

Evening all,

My 056 super muffler (actually the silencer plate that sits between the front cover and the main housing to the
muffler - #8 in the picture) has vibration embrittlement.

The rolled flange has broken around 1/2 of the circumference and is now rattling / buzzing like a pissed off wasp.



Besides replacing it completely (they are NLA of course, used or NOS are available, but very expensive) does anyone have an alternative solution?

What did you do with yours?

I have a few ideas that I could try, but none seem to be ideal long term.

Thanks,

 

[pioneerguy600]

Have you tried running it without the plate?

 

[Vintage Engine Repairs]

Have you tried running it without the plate?

I feared it would be too open and may affect performance, it would basically be a straight open exhaust and crazy loud, the thing is deafening already and seems much louder than even the 076 super !
Have you ran one with it removed?

 

[pioneerguy600]

I have run plenty of hollow box mufflers and remove the internal baffles from most every saw I own.

 

[Vintage Engine Repairs]

I have run plenty of hollow box mufflers and remove the internal baffles from most every saw I own.

Thanks Jerry, it’s not that it’s hollow, more
That the front cover is just full of holes and gaps. It won’t offer any exhaust direction it’s basically this that will be all that’s left covering the muffler front if I remove the baffle plate. It’s unlike the conventional sealed tin can with internal baffle.

 

[pioneerguy600]

Ya, that is a very open front on that muffler. Is the baffle pressed steel/tin?

 

[Vintage Engine Repairs]

Ya, that is a very open front on that muffler. Is the baffle pressed steel/tin?

Yes correct, it’s .5mm pressed steel sheet that just slots on and is covered by the picture I showed above.

 

[pioneerguy600]

You may have to take up welding like we already corresponded about. I had to build up several old mufflers for saws that I couldn`t get replacements for before the internet. After the net became useful I found NOS ones for most except my Titan`s but I did find NOS gearboxes and internal gears for them. I am always surprised at what is still out there somewhere for really old chainsaws from the early 40`s onward.

 

[Woodslasher]

That is the most restricted muffler piece I've seen. If you can't fix/replace your piece, p.m. me, I might be able to hook you up with one.

 

[Vintage Engine Repairs]

That is the most restricted muffler piece I've seen. If you can't fix/replace your piece, p.m. me, I might be able to hook you up with one.

Thanks mate! I’ll call a recommended contact today and keep you updated of the outcome

 

[scallywag]

Perhaps an 056 Magnum muffler would be an option?...I can't remember if the exhaust stud spacing are the same on the Super and Magnum?.. @hotshot

Edit. The 28mm & 31mm are the exhaust port sizes.

 

[hotshot]

Yes Sir, same stud centers & the option was recommended to him already.

If it's an early Super, then it’s prob got the shorty side pipe, which was obsoleted & upgraded to the long pipe to help keep carbon & crap off the clutch cover.