Forum Discussion

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.



  • mlts22's avatar
    mlts22
    Explorer
    May 25, 2016
    I would go for some Fatmat/Hushmat/Dynamat and line the top and sides. I'd also look at the exhaust and wire hangers, see if those can be put on shock mounts, as vibrations through pipes are also a source of noise. I'd finally then slap an Onan resonator, which cuts out the high noises, so it isn't as annoying.

    As for the bottom screws, I'd pull them out and slap LocTite Blue or Purple (not red since red is pretty much permanent) or some anti-seize compound. This way, 1-2 years from now when that bottom is rusty, you still are able to get those screws broken loose for generator maintenance.

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