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Lawn Tractors - Do They Have To Be So Loud?


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#1 chuckt OFFLINE  

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Posted March 23, 2014 - 11:03 AM

I took our Cub Cadet LT1046 in for Spring Service. While I was there they were bringing out their Husvarnas and I commented (amazed) at how quiet the 46" and 54" models were. The tech asked me if our Cub Cadet didn't have a Koehler engine in it. I replied that it did but he didn't volunteer anything else.
So I have to ask - are Kohler engined mowers louder than others? And why? Cheaper mufflers? Or ?
And is there a easy way to quieten _our_ beast?

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#2 JDBrian OFFLINE  

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Posted March 23, 2014 - 12:12 PM

I think it's a design decision when the engineers are putting the tractor together.  A bigger more expensive muffler won't always fit the budget or the tractor. If people complain about the noise then they will design quieter tractors. I'm not sure if there are any standards they have to meet for maximum noise levels. Regulation would be one way to bring noise levels down. 



#3 propane1 ONLINE  

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Posted March 23, 2014 - 12:19 PM

Maybe your muffler has a bad or loose baffle in it. Noel 



#4 glgrumpy OFFLINE  

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Posted March 23, 2014 - 12:24 PM

Quiet was what company's used to work with in late 70;s and 80's. If you will look Cub Cadets and Jacobsen's and others of that Era were all using hood sides and had insulation on them, and also rubber engine mounts. Most twins have those HUGE mufflers now positioned in front of hood area with outlets thru the grills low or straight down. There was once a time then when Quiet was important. Even Kohler models ended in QS or similar letters to mean Quiet Series.  Think it all just cost more and not offered on inexpensive models or if at all any more.


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#5 superaben OFFLINE  

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Posted March 23, 2014 - 12:33 PM

You can make a small engine quiet.  However, like it has been said, it takes money to make it happen.  Noise from an engine includes combustion and vibration.  Mufflers only reduce combustion. 

 

Cheaper engines are usually louder.  Vibration "balance" was not thought out and if it was, it was not important to the budget.  Harmonics is the biggest thing in machinery noise. 

 

Ben W.


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#6 A.C.T. OFFLINE  

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Posted March 23, 2014 - 01:04 PM

Would reducing noise reduce power?  It can on larger engines.



#7 olcowhand ONLINE  

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Posted March 23, 2014 - 01:46 PM

Would reducing noise reduce power?  It can on larger engines.

 

Yes, it does rob some power, most definitely.

 

Actually, when HP ratings are figured on your lawn equipment, it is done without the factory muffler, and without any other HP robbing features so as to drive up the numbers.  So your 16hp tractor may not put out but 14hp when you get it.


Edited by olcowhand, March 23, 2014 - 02:07 PM.

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#8 Oo-v-oO OFFLINE  

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Posted March 23, 2014 - 02:13 PM

A lot of the noise on an air-cooled engine is combustion sound radiated from the cooling fins. Wrap a liquid-filled jacket around it and the noise will go way down. Listen to one of the Honda water-cooled twins for comparison, if you can find one. 



#9 Lauber1 ONLINE  

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Posted March 23, 2014 - 02:29 PM

Come on men, Loud pipes save lives!!!


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#10 olcowhand ONLINE  

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Posted March 23, 2014 - 02:38 PM

Come on men, Loud pipes save lives!!!

 

HUH??   :rolling:


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#11 A.C.T. OFFLINE  

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Posted March 23, 2014 - 03:07 PM

Come on men, Loud pipes save lives!!!

 

6991360009_large.jpg Yes

 

untitled exhaust.png But this could get someone killed (driver)


Edited by A.C.T., March 23, 2014 - 10:29 PM.

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#12 HowardsMF155 ONLINE  

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Posted March 23, 2014 - 03:56 PM

I think it's a design decision when the engineers are putting the tractor together.  A bigger more expensive muffler won't always fit the budget or the tractor. If people complain about the noise then they will design quieter tractors. I'm not sure if there are any standards they have to meet for maximum noise levels. Regulation would be one way to bring noise levels down.

JD!!  Wash your mouth out with soap!  I don't want G.I. Beaurocrat standing at my property line with a decibel meter.  That said, I'm in favor of quiet tractors if only to save the operator's hearing. There are some quieter mufflers out there, but it isn't all just the muffler.  The "SuperTrapp" is the one coming to mind. 


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#13 chuckt OFFLINE  

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Posted March 23, 2014 - 06:39 PM

I just want use a quiet machine. The neighbors west of us had a quiet 42" Yardman (recent vintage) the one beyond them has a quiet Wheelhorse (1980s?). I hear ZTRs all the time that are quieter than our Cub.

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#14 trowel OFFLINE  

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Posted March 23, 2014 - 07:13 PM

Living loud in the country.

 

 

 

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#15 Bolens 1000 ONLINE  

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Posted March 23, 2014 - 07:26 PM

Another thing to consider,

The newer mowers will be louder than alot of the ones from the 80's and older due to them running at higher RPM's. Todays newer machines are based on inflated HP and higher RPM numbers not shear torque like the old ones used to.

Not having side panels and good motor mounts also adds to the noise.


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