Quieting Lawn Tractor
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Fleet Mechanic
Joined: Jul 2003
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Quieting Lawn Tractor
I have an 18hp Koeller twin cylinder Craftsman lawn tractor. I wore hearing protection till last summer. My head phone style protection fell apart and I got an irritation from them. I am looking for sheets of the black under hood insulation, not precut for a particular model. Also does anyone have any ideas for the exhaust. PS I've already installed thermistors in the engine so I can monitor the temperatures.
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Joined: Apr 2002
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From: Central Kali
I made a custom muffler for a 5 hp Briggs that worked pretty good. I took a round tube and welded in end caps with smaller pipe going thru them. The smaller pipe has the ends blocked off but has a bunch of 3/16 holes. The exhaust has to go out of the small holes into the large tube then go into the small holes of the second small pipe before it gets outside. It was a lot quieter then the stock muffler. 
Senior User
Joined: Feb 2004
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From: topeka
how old is your mower? The last new rider i bought was a 98 and it has a muffler considerably larger and quieter than the 96 and the 94.
Most of the noise comes from the deck anyway. I thought about trying to do some noise surpression but quickly gave it up. Too many things in the way.
What style of hearing protection were you wearing? I have two pair, one has deep cups, very comfortable, like they wear around airports (couldn't find a second set) and the other came from Lowes. the cups aren't very deep and yes those are irritating. Way too shallow for my very prominent ears.
I haven't seen the muffler for a kohler rider but the one on my Walker GHS 16hp V-twin does the job very well. Sounds like a Harley sometimes. But after engaging that gear driven deck you can't hear the motor much. Those decks are screamers. After doing one yard i took it back, thought a bearing was out of it.
Just a thought, go look at the Walker mufflers, see if you can adapt one
Most of the noise comes from the deck anyway. I thought about trying to do some noise surpression but quickly gave it up. Too many things in the way.
What style of hearing protection were you wearing? I have two pair, one has deep cups, very comfortable, like they wear around airports (couldn't find a second set) and the other came from Lowes. the cups aren't very deep and yes those are irritating. Way too shallow for my very prominent ears.
I haven't seen the muffler for a kohler rider but the one on my Walker GHS 16hp V-twin does the job very well. Sounds like a Harley sometimes. But after engaging that gear driven deck you can't hear the motor much. Those decks are screamers. After doing one yard i took it back, thought a bearing was out of it.
Just a thought, go look at the Walker mufflers, see if you can adapt one
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