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Onan Generators

how quiet is your onan?

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Old 10-02-2015, 02:46:40 PM
Tracy T Tracy T is offline
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Thumbs up how quiet is your onan?

I finally got my jc's exhaust routed and I must say I am impressed! Dang the fridge makes more noise! I am sitting in my living room no more than 20 ft away and all I here is a steady purr.
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Old 10-02-2015, 03:02:35 PM
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BRae BRae is offline
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Default Re: how quiet is your onan?

My JB is in a detatched garage about 8ft. from my bedroom side of the house Its 16X24. The silencer is inside the garage, an extra thread on muffler outside on the exhaust. It is barely noticeable in the bedrooms. Other parts of the house it is not noticeable at all. Outside. Anymore than 20-25 feet away its very difficult to hear.

---------- Post added at 03:02 PM ---------- Previous post was at 03:00 PM ----------

I think my new phone has an app for decibel readings. will have to get it out there and take some readings.
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Old 10-02-2015, 07:14:23 PM
Aknovaman Aknovaman is offline
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Cool Re: how quiet is your onan?

Mine is pretty quiet even in concrete driveway.
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Old 10-02-2015, 08:31:56 PM
Radarman Radarman is offline
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Default Re: how quiet is your onan?

With the little stubby muffler that came with my JB it's pretty loud. I wear ear protection when I am running it.

I plan on getting a large auto muffler for my JC. That should be much quieter than the JB.
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Old 10-02-2015, 09:13:55 PM
yellowlister yellowlister is online now
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Default Re: how quiet is your onan?

My 2,5 lk w/ nelson muffler is slightly noisier than a 2000 watt honda inverter gen.. ran one next to it for comparison.. was very impressed.. just engine noise is all u hear.. my 4.0 cck with original muffler that came out of a airstream trailer makes more noise but still pretty quiet.. my other onans with nelson mufflers make more noise.. id say my nh is 3rd.. than the bfas .. I wish I could make the jbs quieter ut its mostly air moving that u hear.
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Old 10-02-2015, 09:37:37 PM
JohnnyC JohnnyC is offline
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Default Re: how quiet is your onan?

My 15.0JC has an automotive cherry bomb for a muffler a.k.a. glass pack muffler. If these gensets were not fixed for 1800 rpms, my JC would probably be a good contestant in a muffler rapping contest. Actually, the noise is not too bad, but not the most quiet either. It sounds like a forklift on steroids.

New Jersey
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Old 10-03-2015, 12:51:32 AM
richard.bessey richard.bessey is offline
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Default Re: how quiet is your onan?

With my Onan CCK, running 1000 watt load, 72 db at 23 feet away. Yes I have a sound meter and have compared various pieces of lawn equipment. The onan is one of the quietest.
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Old 10-04-2015, 01:50:40 AM
Jim Marcozzi Jim Marcozzi is offline
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Default Re: how quiet is your onan?

MY 12.5 JC whispers. I have a Nelson muffler and the outlet goes downward and exits parallel to the ground about 6" above ground level. The genset is enclosed in a home made housing that's lined with 4" pink fiberglass insulation for noise control.

Can't hear it run from the house.
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Old 10-04-2015, 02:53:41 AM
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Motorhead Motorhead is offline
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Default Re: how quiet is your onan?

The enclosed 7.5JB I bought came from Onan with a Nelson Critical muffler on it. It's super quiet.
My 5kw CCK is pretty quiet even with 30 amps of load.
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Old 10-04-2015, 11:13:37 AM
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Onan Dan Onan Dan is offline
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Default Re: how quiet is your onan?

How quiet you ask I can lay down beside my 7.5 JB and go to sleep really my garage is 60 feet from my bed room window and any onan I have is so mellow it sings me to sleep other than that CCKB 10.0 3600 rpm now it is not quiet of course it is just a conversation piece I run my onans on the Summit oval or flat mufflers and they are nice the mechanical works on the motor in the garage is noisier than the exhaust out side.
Summit racing equipment Walker universal sound FX muffler 17903 1.5 inlet-- 1.5 outlet $24.95 plus shipping
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