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Old 06-10-2010, 05:03 PM   #1
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Default Noisy Onan 2.8Kw gensets

Aside from some homemades and at least one "Gen-turi" I've found online,
does anyone have any DIY or "store-bought" type genset muffling systems that
they might recommend? In additon to the OEM muffler setup?
I understand there's a (somewhat less than effective) muffler located somewhere
inside the genset housing. I was thinking there might be an additonal external
removable device (that you could add to the exhaust pipe) I could buy or build.
My genset is mounted under the reaer end of my Roadtrek, as many are.

Any thoughts or suggestions (no matter how bizarre) would be appreciated.
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Old 06-10-2010, 09:07 PM   #2
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Default Re: Noisy Onan 2.8Kw gensets

Mike, I put on a Onan Resonator a couple of years ago, quieted it down somewhat....$36 at DYER'S RV Store. Then again my hearing isn't what it used to be, ha!! Ron
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Old 06-11-2010, 03:04 AM   #3
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Default Re: Noisy Onan 2.8Kw gensets

Onan Resonator? Never saw that in my google wanderings.
I've had a subsequent google, and found some pretty extreme mods (since I don't weld),
but this web page has a dual Onan Resonator/Super Trapp spark arrestor combo.
http://myroadtrek.homestead.com/OnanResonator.html
Thanks for the ideas RJ. I'll check it out tomorrow.
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Old 06-11-2010, 04:58 AM   #4
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Default Re: Noisy Onan 2.8Kw gensets

Mike if the Super Trap you mention is the "baffles" that attach to the end of the gen tailpipe, I tried that also. Got the set-up from Jack's Small Engines online.....another forget it for me item - but then that was just my idea!!! Ron
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Old 06-11-2010, 07:02 AM   #5
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Default Re: Noisy Onan 2.8Kw gensets

I am slowly and I'll restate slowly working on a tail pipe extention on mine mostly for taking the fumes further away, the added pipe will quiet it down some also. I found that a great fit on the Onen tail pipe is a sink drain. from that I plan to get it to a larger size to reduce back pressure. I want to have a couple pipes that I can combine so I can store it easy and something to keep it off the ground so if any grass is around it won't start a grass fire.
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Old 06-15-2010, 10:11 PM   #6
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Default Re: Noisy Onan 2.8Kw gensets

Thanks for the ideas guys. I may try the spark arrestor first as it looks like it might be
the easiest. Not sure I want to start "cutting and splicing" stuff into the exhaust pipe yet.
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Old 06-26-2010, 04:56 PM   #7
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Default Re: Noisy Onan 2.8Kw gensets

I just got the Onan Resonator for my Roadtrek. I have not mounted it yet but slipped it over the pipe the other day when I was running the gen, It did seem to quiet down a bit but more mellowed the sound so it was less irritating. It looks like it will fit on the angle portion of the exhaust pipe when I get around to the installation. I think it was about $19 at the Onan Shop.
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Old 06-26-2010, 06:05 PM   #8
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Default Re: Noisy Onan 2.8Kw gensets

Are you going to cut the exhaust pipe to install it under the van?
Or I was thinking it could be added to the end if you were bold enough
to shorten the stock exhaust pipe a bit. I'm also trying to find out if the
spark arrestor would help as well.
I know what you mean about "annoying" - mine sounds like a lawn mower on steroids.

Thanks for the ipnut.
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