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Discussion Starter #1
I am sorry if there are all ready posts on this topic, I am new to the site and tried the search.

My main issue I have with my 420 is it is so loud as compared to the new water cooled units. :banghead3

I keep thinking, as I sit with my ear protection muffs on, that a simple mod to the muffler might help. Maybe some thing as simple as a 2nd muffler off say a motor cycle with a chrome heat shield already on it could just drop vertically toward the ground, maybe with an exhaust turn out to the front.

Any body done a quiet it down modification to the seemingly millions of 300 and 400 air cooled JD that so many of us love.

Just thinking out loud as they say.

Any solutions

Yamadoo
 

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Trying to baffle, further muffle, or add any restriction to the exhaust on the engine will serve to diminish the life of the engine as well as possibly quiet it down. It is the nature of the beast, and the way they were designed. I'm afraid that virtually anything that you might do to stiffle the noise of the Onan engine will do more harm than good.
 

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im not sure about the onan engines but i know briggs has multiple mufflers some are quieter than others and they will not have any effect on the engine life what i have done in the past is to take the muffler off from the engine and put a piece of steel wool or two in the inlet side and that helps quiet them down some just dont pack the steel wool in to tightly or you will severly restrict the flow and then possibly reduce the power and life of the engine
 

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Discussion Starter #4
Thanks guys, I will stay with the ear protection for now.

Stash I will get to the battery and voltage testing this week I hope. THanks so much for your input.

I am assuming the added back pressure is why not to modify exhaust.....? correct?

Yamadoo
 

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Discussion Starter #5
Has anyone tried a simple exhaust turn out toward the front or 45` toward the front and ground?


Yamadoo
 

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even if you did muffle it better, you shoudl wear the ear protection. i never was a big believer in it myself until my wife got me a set of Work Tunes headphones that are noise cancelling. prior to this i spent 5 years getting a major headache after cutting due to either the mower or the walkman being so loud. now i listen to music at a low volume that does not hurt my ears and can still hear the machine if soemthing goes wrong, it is just a dull hum in the back ground though.

what about trying teh flex stuff as suggested in post #19 http://www.mytractorforum.com/showthread.php?t=88583 scroll down to see some more of it.
 

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even if you did muffle it better, you shoudl wear the ear protection. i never was a big believer in it myself until my wife got me a set of Work Tunes headphones that are noise cancelling. prior to this i spent 5 years getting a major headache after cutting due to either the mower or the walkman being so loud. now i listen to music at a low volume that does not hurt my ears and can still hear the machine if soemthing goes wrong, it is just a dull hum in the back ground though.

what about trying teh flex stuff as suggested in post #19 http://www.mytractorforum.com/showthread.php?t=88583 scroll down to see some more of it.

Let me interject from someone who has a hearing loss, from loud noise/trucks/rock concerts, etc... exposure many years ago--and not knowing the difference's--now have to accomidate a new hearing aid.

..Wear hearing protection
--anything above 70 Dbl.--the govt. recommends a little more--but once hearing damage is done--irt's irreversiable!!
You may not know it--and it doesn't affect a lot of people--but over 500 million in the US alone have some/all hearing loss....

I keep my "muffs" hanging the garage- (several pair) -when I start anything--I slip them on first--just like eye protection...

Word of advice--my brutha!!
 

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The Onan engine is just noisy period. I don't know which is louder, the exhaust note, or the piston slap.
 

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Discussion Starter #9
Thanks guys.

I will keep wearing the ear protection.
Good advice for all.

The stainless steel flex pipe looks very interesting. I can see were it would work theoretically

Yamadoo
 
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