I have a 7KW generator that makes a hell of a racket on a cold frozen night
when the power is out. Is there a muffler kit that can be used on an air
cooled engine, if so what type or suggestions on how to quiet this thing.
What you may want to try is building an enclosure that will house the
generator. The enclosure would be insulated, to dampen the noise.
The enclosure would have to be large enough to have at least a few inches of
room all around the generator. You'd also want to leave open one side of the
enclosure so that the exhaust had a place to go and also to prevent a fire.
You could then staple either insulation on the walls and cieling of the
enclosure or find egg-shell type sound proofing material to use. It will
not dampen the sound totally but could help.
I went to the auto parts store and asked for their smallest car muffler.
The generator exhaust port is a pipe thread. I connected a piece of
pipe and an elbow to go into the muffler. The muffler came with an
adapter which allowed a snug fit over the pipe. A clamp then held it
tight to the pipe. As for quiet, is isn't, however, it is much, much
quieter than before. Friends have said that this will put back pressure
on the engine and cause problems. It probably does, however, it seems
to run just fine .... maybe because the car muffler is for a much larger
engine than in the generator.
Reducing noise will reduce your power out put. Talk to the
manufacturer . But so what , it is an emergency generator. Right ?
Noise should be expected in emergencys. maybe you worry to much, offer
your neighbor Free Power in an outage. I would not worry, either way.
To amplify a bit more: a recommended approach is to build a small enclosure,
with a couple of inches open at the bottom (all the way around), and a vent
at the top. Then line the enclosure with insulation. Make sure you have
SEVERAL inches of clearance all the way around the unit, and the bottom and
top vents are clear.
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.
I personally would like to thank you for your consideration. Year before
last during the big Northeast blackout, four of my neighbors fired up their
generators. It sounded like pole position around here, and it was tough
enough trying to sleep without any AC or fans, let alone the noise.
I have wondered (and worried) about the noise and my neighbors also.
Here I am sitting watching baseball with my lights on while they were
sitting around in the dark.
Anyhow, I think I remember Home Depot selling a sound proof box with
exhaust during the Y2K scare. It wasmade with the sound dampening
type metal with holes, etc., like they use on the big air compressors
at construction sites.
Does anyone remember more?
Last April we had a blackout. From the foot of my driveway I could hear
someones generator at the end of the street (about a quarter mile away) but
I couldn't hear my Honda in my garage.
If someone near me ran one of those monsters at night... well, lets just
say that it is not necessary.
When Ivan passed through Atlanta, we lost power for 3 days. ONE neighbor
fired up a generator every night and the rest of us were ready to lynch
them. It sounded like a huge aircraft engine was running.
Finally found out who it was and said that their noise was unbearable.
She slunk away saying the family had allergies and had to run the
dehumidifier. (And also the tv, microwave, stove, hair dryer...)
More power (literally) to the genny people, but if you could just make
them quieter it would take the sting out of the cold and dark for the
rest of us.
But that is my point exactly. The Honda is dead quiet; sometimes I have to
check to see if it is still running because I can't hear it inside the
Okay, I can't run a hairdryer or oven, but who needs that stuff in an
It is connected, but I leave the front and rear garage door open a foot for
ventilation. I have tried a battery powered CO detector on the floor a few
feet from the genny, but it shows nothing.
The Honda runs 8 hours on a gallon of gas. How much CO could it produce?
I definitely produces enough CO to kill somone, because there are incidents
every year where people die after running them in their basements. A typical
car can probably idle for 8 hours on a gallon of gas ... but it sure doesn't
take that long for someone to kill themself that way!
I wouldn't take any chances - why not just build a little box with a roof
for it and stick it outside when you need to run it?
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