312-8 stack exhaust

[KW88 17]

What have you guys done to replace 312-8 with a stack exhaust/ pipe? Appears I gotta 1-3/8 OD off the 12hp kohler... 

[KW88 17]

4 minutes ago, KW88 said:

What have you guys done to replace 312-8 with a stack exhaust/ pipe? Appears I gotta 1-3/8 OD off the 12hp kohler... 

I'm not worried about noise, just want like a small stack like a foot or two up

[SylvanLakeWH 24,237]

@jimkemp sells them...

[ebinmaine 63,346]

 

 

8 hours ago, KW88 said:

1-3/8 OD

 

That's an NPT pipe thread size.

Likely 1-1/4".

 

I've done several Kohler single cylinder engine exhausts using a 45⁰ elbow attached to appropriate length double male pieces. One to the head and one to the muffler.  

 

For a muffler I've used a Cub or Gravely aftermarket replacement. 

Either works well and can be turned facing up. 

On top of the muffler you can get a metal bathroom drain pipe and trim as desired. 

This gives you the ability to have a turnout bend and point the end where you want it. 

 

 

[rjg854 10,767]

This is what he makes, they look like this.

[RED-Z06 2,139]

1" NPT into a 45⁰ elbow pointed straight out, into a 4" straight pipe, into a 90⁰ elbow up...into a "Kohler cub cadet" muffler.

 

https://youtube.com/shorts/V6y0zUDAdWI?si=y4DPgo1nZ-8go2uR

[ebinmaine 63,346]

5 hours ago, RED-Z06 said:

1" NPT into a 45⁰ elbow pointed straight out, into a 4" straight pipe, into a 90⁰ elbow up...into a "Kohler cub cadet" muffler.

 

https://youtube.com/shorts/V6y0zUDAdWI?si=y4DPgo1nZ-8go2uR

 

That's the way. 

 

You can use the above mentioned Gravely Muffler in the same set up. 

 

Also, where the 4" pipe is listed, I've used a longer section either from engine to elbow or elbow to muffler to add a little clearance for the hood paint.