Muff modding gone wrong.

[idiotwithasaw]

This is why you should make sure all the grindings are out of your muffler before you put your saw into use.

This was one of my first attempts at a muffler mod on a 550 before I owned a dremel. I guess with the baffle I didn't get everything out when I blew it out.


I'm gonna clean it up and run it as is. There is some scoring about an eighth of an inch from the squish band. This was a relatively low hour topend, oh well you live you learn.

Edit: I have since put this saw back together and ran it, it runs good and I can say it is still impressive.

 

[cobey]

Bad deal, good thing it's fixed now

 

[lwhaples]

Good to show what not to do.Nice that you saved it.

 

[smokey7]

I will see if I can find some pictures of my brother in laws muffler mod and porting attempt on a assembled engine. No air compressor either. It was jammed up with steel and aluminum chips. It runs again but he raised the exhuste so high it lost a bit of torque.

 

[mcginkleschmidt]

Muff Modding? I've heard of Muff Diving but Muff Modding threw me until I realized you were talking about mufflers.

 

[Tor R]

Thanks for posting this warning.
My first mm was done cleaning with air pistol, should check how it look after a year in use.
Will use vacuum machine and blast with air on same time from now on.

 

[sunfish]

I bought a very clean 359 that the previous owner "cleaned" the scored cylinder. He left so much grit in there that it killed the new piston and all the bearings. He was baffled why it didn't run very long. lol

 

[Chainsaw Jim]

This is exactly why everyone should pay me to work on their saws. That way you have piece of mind knowing it wasn't you that f'd your saw all up. Lol

 

[redoakneck]

Here is a good one on a dirt bike!!!

 

[countryhog]

I got some like ^. just cleaned em up best I could and run em. they're okay and since I got em that way can't tell any impact. ignorance is sometimes good. just sayin.

 

[beaglebriar]

Dish soap and hot water works wonders for cleaning out modded mufflers.

 

[Czed]

I pressure wash them works for me.

 

[Motorhead]

This is exactly why everyone should pay me to work on their saws. That way you have piece of mind knowing it wasn't you that f'd your saw all up. Lol

 

[TJ the Chainsaw Mechanic]

Just needed a richer mixture.

 

[XP_Slinger]

Threads like this are where the REAL learning occurs. Sometimes I don't truly learn something until the head slap "Doh!". Ha ha ha!

 

[Dolmar Junkie]

Muff Modding? I've heard of Muff Diving but Muff Modding threw me until I realized you were talking about mufflers.

×2 I came here expecting to see pics of a Brazilian Muff Mod...

 

[XP_Slinger]

×2 I came here expecting to see pics of a Brazilian Muff Mod...

 

[Glock37]

×2 I came here expecting to see pics of a Brazilian Muff Mod...

Next is muff lapping

Pics of Brazilian muff mods ?


Sent from my iPhone using Tapatalk

 

[Dolmar Junkie]

Next is muff lapping

Pics of Brazilian muff mods ?


Sent from my iPhone using Tapatalk

Gone to get Lapping compound...

 

[Wilhelm]

I did two mufflers, Dolmar PS-7900 and Sachs-Dolmar 108.

I went the safe route and split them open for the mod.
Washed them thoroughly with brake cleaner and loads of water after the grinding and before reassembly!

Took a while longer I guess, but better safe than sorry?!

BTW:
No noticeable nor perceivable gains from the MM on my Sachs-Dolmar 108.

My Dolmar PS-7900 gained perceived "wow" effect and a extremely pleasing sound at WOT!
I don't even care whether she gained anything performance vise.