Exhaust Stack

[1987_WHEEHORSE312 27]

So I did alot of searching and most people unscrew the exhaust nipple from the block, and then used galvanized tubing to build a stack. I found the nipple on my tractor was stuck, so I went a different route and I want to make this thread to help others, cause I couldn't find a solution and had a really hard time finding the 1 1/2" exhaust tubing. 

 

 

Napa has 90 degree pipe with a  1 1/2" ID on one side and 1 1/2" and OD on the other side. That paired up with 2 muffler clamps and a Stanley Muffler Company Ford tractor muffler got me the sound and hight I liked. Sound wise is pretty much the same as stock. I added a rain flapper, and after this photo was taken I turned it around where the hinge on the flapper was facing the front of the tractor. I am getting some 1/4 inch strap steel after work and will make a bracket that will go from the muffler clamp down to the stock brace bolt that was used on the stock muffler. 

 

All and all this costed me $30 for the 2 clamps and piping, and another $60 for the muffler. The flapper is had from a Mud Mower build I did 15 years ago, and just kept the flapper laying around all these years, figuring I would add it to a tractor some day. All the piping is 1 1/2" including the inlet and outlet on the muffler. 

 

[ri702bill 9,988]

Nice - I did similar using a glasspack and the raincap on my 854.

You may wish to add a lower rigid support bolted to the engine - a low hanging branch could damage the area of the block threads upon impact...

The reducing run tee made it easy, but was really difficult to find in 1".

 

[1987_WHEEHORSE312 27]

2 hours ago, ri702bill said:

Nice - I did similar using a glasspack and the raincap on my 854.

You may wish to add a lower rigid support bolted to the engine - a low hanging branch could damage the area of the block threads upon impact...

The reducing run tee made it easy, but was really difficult to find in 1".

 

Yea, im planning on getting some 1/4" strap and making a bracket. 

[ri702bill 9,988]

One thing I had to experiment with using a straight thru glasspack muffler was the back pressure. These small engines rely on having a small amount of back pressure to run properly. I added a larges disc washer drilled with additional small holes - it is captured in between the muffler outlet and the entension pipe. The length of the extension changes the tone also....

[1987_WHEEHORSE312 27]

2 minutes ago, ri702bill said:

One thing I had to experiment with using a straight thru glasspack muffler was the back pressure. These small engines rely on having a small amount of back pressure to run properly. I added a larges disc washer drilled with additional small holes - it is captured in between the muffler outlet and the entension pipe. The length of the extension changes the tone also....

interesting, I will have to keep and eye on it. 

[Pullstart 68,057]

We like stacks here!  
 

 

[1987_WHEEHORSE312 27]

1 minute ago, Pullstart said:

We like stacks here!  
 

 

Looking good! 

[Bar Nuthin 1,426]

4 hours ago, Pullstart said:

 

 

Is that a Harley muffler?  I have a couple stock Sportster mufflers stashed around here somewhere but wasn't sure how well they would work on a Kohler K-series.

[Pullstart 68,057]

1 hour ago, Bar Nuthin said:

 

Is that a Harley muffler?  I have a couple stock Sportster mufflers stashed around here somewhere but wasn't sure how well they would work on a Kohler K-series.

It is.  @953 nut stuck it on Hot Wheels before I purchased it.  The only exhaust modification I did was to drill out the baffle.  

[ri702bill 9,988]

That makes it a "Hardly Dangerous"!! Suitable for ages 10 thru Adult - You're in, Kevin!!!