How I installed a new muffler

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DHort
Posts: 504
Joined: Sun Jan 06, 2019 1:30 pm
First Name: DAVID
Last Name: HJORTNAES
Location: Men Falls, WI
MTFCA Number: 28762
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How I installed a new muffler

Post by DHort » Thu Sep 26, 2019 6:31 pm

As some of you know I had Muffler troubles on my way to OCF. Dallas helped with a temporary repair, but I decided to go with a different tractor muffler. I purchased the Stanley muffler FO-11 and a tail pipe and a new hanger.
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Dallas and I modified the hanger but cutting off part of the rubber material, since it was too long, and cutting off some of the metal from the piece that attaches to the muffler. Hopefully that is clear in picture #4.
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Next step is to find out where to hand the muffler from. Remember that the muffler is not clamped on to the exhaust pipe, so the hanger is the only place of attachment.


Topic author
DHort
Posts: 504
Joined: Sun Jan 06, 2019 1:30 pm
First Name: DAVID
Last Name: HJORTNAES
Location: Men Falls, WI
MTFCA Number: 28762
MTFCI Number: 22402

Re: How I installed a new muffler

Post by DHort » Thu Sep 26, 2019 6:46 pm

If looking up from below you can see a couple holes in the frame and another hole in the triangular piece above the frame. I chose to use the hole in the frame. The holes are at the very top of the picture. The software cropped the picture a bit much.
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This hole is too far to the left so I needed a piece of metal to hold the hanger. I cut off a piece of steel 4.5 inches long and 1.5 inches wide. This I had to drill two holes in.
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I placed the muffler on the exhaust pipe so I could note how far the muffler goes on. I marked it with a sharpie. This is where the muffler and exhaust pipe flex.
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Next I attached the hanger to the metal piece, and then attached that to the frame. I put the exhast pipe in place and attached that to the exhaust manifold with the nut. This was put on loosely. I also used a floor jack to hold the exhaust pipe in place, because it will bounce off the floor if you do not. Now I could line everything up and put the muffler on the exhaust pipe. It fit perfectly and the hanger was in the right place.
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You do not need a tail pipe, but I have a spare tire in back so I added a tail pipe. It was $9 at NAPA for item #41733. It was longer than I needed so I cut it off where the item number tag started, so about 4 inches. Looks better that way too.
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Topic author
DHort
Posts: 504
Joined: Sun Jan 06, 2019 1:30 pm
First Name: DAVID
Last Name: HJORTNAES
Location: Men Falls, WI
MTFCA Number: 28762
MTFCI Number: 22402

Re: How I installed a new muffler

Post by DHort » Thu Sep 26, 2019 6:56 pm

Now everything was lined up and I could tighten the clamps. First I tightened the nut on the manifold. It is worth spending the money to purchase this tool. I have needed it more than once. And even though I get it nice and tight I have had the nut loosen. I strongly recommend the clamp with the tag to hold your exhaust nut in place.
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Then I made sure the muffler was all the way on the exhaust pipe, added the tail pipe, and tightened up the clamp on the hanger and muffler. Now the muffler flexes on the exhaust pipe like it should and there is a little flexibility with the hanger. Just enough so that it should hold up well.
This next picture shows the entire assembly put together and held up with the jack stand.
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The last picture shows it when I went inside for a beer.
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I hope this helps at least one person who needs to update their exhaust system. If you want to add a whistle, you are on your own. That requires cutting the exhaust pipe into a couple of pieces, but if you want a whistle go for it. They do have a nice sound.

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BobD
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Re: How I installed a new muffler

Post by BobD » Fri Sep 27, 2019 12:08 am

Nice clean installation Dave.
I installed an F0-11 muffler on my ’26 runabout the same way as you did. Short tailpipe as well to keep the exhaust off the spare. I am pleased with the sound.

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