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N-Trouble's avatar
N-Trouble
Explorer
May 23, 2016

Noisy Onan 4K = hack job install?

Didn't want to continue railroading the other guys thread so starting a new one.

Were discussing why my Onan 4K is so noisy in my 5er and many pointed to the install and discussion around anti-vibe mounts. Here are a couple of pics of my install and you can see the unit is not mounted on ANY type of mount. All they did was run about 4 sheet metal screws up through the bottom of the compartment box into the genny to hold it in place. Suspect this is why I get so much vibration... Looking at the big gaping hole they cutout from the bottom it doesn't even look like I could put this thing up on anti-vibe mounts.



11 Replies

  • thats a totally enclosed unit
    in the bottom of that picture, it looks like rubber mounts for the motor
    it is possible they are too tight

    you could put in a new piece of flooring, say a piece of 5/8 plywood with a hole cut for the exhaust, maybe some metal flashing/heat insulation
    an set the whole genset enclosure on new mounts

    look up the mounting instructions for that model
    should be easy to find the PDF file, should also be in your generator manual that came with the install

    Cummins Onan QG manual

    from the pictures, it looks like internal springs between the power section and the enclosure floor

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