Page 1 of 1

How I installed a new muffler

Posted: Thu Sep 26, 2019 6:31 pm
by DHort
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.
muff9.jpg
muff9.jpg (65.15 KiB) Viewed 913 times
muff6.jpg
muff6.jpg (94.48 KiB) Viewed 913 times
muff4.jpg
muff4.jpg (107.48 KiB) Viewed 913 times
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.
muff5.jpg
muff5.jpg (110.44 KiB) Viewed 913 times
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.

Re: How I installed a new muffler

Posted: Thu Sep 26, 2019 6:46 pm
by DHort
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.
muff8.jpg
muff8.jpg (23.24 KiB) Viewed 902 times
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.
muff7.jpg
muff7.jpg (108.91 KiB) Viewed 902 times
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.
muff1.jpg
muff1.jpg (28 KiB) Viewed 902 times
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.
muff10.jpg
muff10.jpg (56.9 KiB) Viewed 902 times
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.
muff6.jpg
muff6.jpg (94.48 KiB) Viewed 902 times

Re: How I installed a new muffler

Posted: Thu Sep 26, 2019 6:56 pm
by DHort
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.
muff11.jpg
muff11.jpg (106.64 KiB) Viewed 889 times
muff12.jpg
muff12.jpg (63.63 KiB) Viewed 889 times
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.
muff2.jpg
muff2.jpg (47.94 KiB) Viewed 889 times
The last picture shows it when I went inside for a beer.
muff3.jpg
muff3.jpg (52.33 KiB) Viewed 889 times
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.

Re: How I installed a new muffler

Posted: Fri Sep 27, 2019 12:08 am
by BobD
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.