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wincrasher65's avatar
wincrasher65
Explorer
Jun 09, 2014

Appalling sound from Onan QG 2800

I ordered a resonator and a downpipe to see if I could quiet the noise a bit.
Without anything running inside, except the fridge I get this at about 10 feet:

With the resonator:

Without resonator, but with down pipe:

Generator shut off, quiet shop:

The tone is much more pleasant with the resonator. The down pipe also mods the tone, but not that much.
  • Present-day Hondas are "Inverter" generators - actually create power differently (in the Onan the engine turns a standard generator winding. Inverters have magic electron powder or similar inside...). Second is durability. Onans can run for thousands of hours - not typically done with Hondas, etc. Still wish my green machine ran quieter!!! ST
  • Isn't the Honda 3000 generator rated at something like 55db? How can they be so much quieter?
  • Depending on your phone it will not work for very loud sounds. The mike limits it. Mine pegs at 80db. I have resigned myself to parking a long way away from others if possible, or park next to a running big rig.:)
    Wayne, 05 PW Excel
  • path1 wrote:
    (Sorry off topic but I need help)

    Is that tool expensive?

    I need one for my wife that talks to me same time looking out the window the other way and complains I don't listen to her.

    YA, Because I can't hear her...that tool would provide proof.


    I put one on my phone for free from the Google Play store. It works just as well.

    SOUND METER

    For pretty much the same reasons.............:B
  • path1 wrote:
    (Sorry off topic but I need help)

    Is that tool expensive?

    I need one for my wife that talks to me same time looking out the window the other way and complains I don't listen to her.

    YA, Because I can't hear her...that tool would provide proof.


    search on Amazon for "db meter". There are many to choose from. Think this one was $25.
  • (Sorry off topic but I need help)

    Is that tool expensive?

    I need one for my wife that talks to me same time looking out the window the other way and complains I don't listen to her.

    YA, Because I can't hear her...that tool would provide proof.
  • I assume you're measuring on the 'A' scale. I'd be interested to see the same sound measurements at 23'; seems to be a standard in the generator industry. it'd help folks judge how much the 'QG' means in real world terms. (I got my pre-QG down to 56-57 dbA @ 23' with considerable effort, but it's in a compartment. That's also parked outside on grassy gravel.)

    One thing you might want to experiment with is adding some neoprene washers (2-3 per) between the mounting plates and the green-box-of-noise. Use blue Loctite on the bolts so you don't have tighten them more than a bit snug.

    Of course, all the noise isn't all exhaust. Cooling air inrush is part of it. Then there's the noise that comes out with the exiting cooling air around the tailpipe. If you're willing to experiment, try a piece of carpet under the exhaust exit; it'll probably help when parked on pavement.

    Good luck with it.

    Jim, "Unapologetic flatulator."