Muffler Installation

[T-Town Mini]

Pretty easy...you just screw it in, right? Well, what if it keeps wanting to loosen up all on its own? I would like to find a Jam Nut to lock the muffler onto the header and keep that from happening.

I found one in my pile of stuff but it's not the right size:

Right now I have the muffler screwed on using a strap wrench as tight as I can get it and, its secured with some safety wire. It's not coming off currently but, I'd still like to have the right kind of nut to install it correctly.

Where can I get one and what size do I need to order? If anybody has a part number or proper nomenclature to look up...I'd be grateful for the information.

Anyone else have the same sort of problem with the muffler coming unscrewed? What was your solution?

 

[minibikin']

Hardware store, electrical section, 3/4" pipe conduit jam nut...:thumbsup:

 

[T-Town Mini]

I would've never thought to look there. D'oh!

I've occasionally searched online and came up with nothing every time. :shrug:
Thanks for the simple solution.

 

[minibikin']

The genuine Tecumseh ones are discontinued. The conduit one is a close enough substitute for me. Glad I can help...

 

[Inventorpardue]

Chad that is a good idea.

Grainger has these malleable black iron 3/4 pipe thread lock nuts

Ebay lists these stainless steel 3/4" pipe thread nuts

 

[T-Town Mini]

These were at Lowes for .50¢

That works much better.

I'll see how well it holds over time.

 

[T-Town Mini]

The genuine Tecumseh ones are discontinued. The conduit one is a close enough substitute for me. Glad I can help...

I have a Briggs & Stratton 3HP that came with a nut on the exhaust...I assume there could be a part number for those as well. ?

 

[T-Town Mini]

Chad that is a good idea.

Grainger has these malleable black iron 3/4 pipe thread lock nuts

Ebay lists these stainless steel 3/4" pipe thread nuts

The conduit lock nut from Lowes had a loose fit on the threads...I think a thicker lock nut like those examples you gave may be a better fit and even more secure. Thanks for the links.

 

[minibikin']

I agree.^ However, the thin one looked closer to my original so that's why I went with it. The 1/2" Briggs lock ring is still available.


Sent from my Texas Instruments Speak and Spell...[emoji2]

 

[chipper]

Still won't work , cut the threads off and weld it on !

 

[gumpit]

One self tapping screw:thumbsup:

 

[chipper]

^^^ what he said , ghetto style but will work !!

 

[george3]

These were at Lowes for .50¢

That works much better.

I'll see how well it holds over time.

Those are the paper thin china crap. You need the thick ones.

 

[T-Town Mini]

Update:

This lock nut has proven to be more than satisfactory in retaining the muffler to the header on my Predator. After it was initially secured the muffler never loosened up. I took the muffler off once to coat it with high heat paint to match the header a year or so ago and, I've put a bunch of miles on it since. It's still holding on strong.

The concave shape to the nut is just enough to lock it in place with minimal tightening applied. This is a good cheap alternative for anyone having issues with a screw on muffler.