bigbravedave
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| posted on 19/9/11 at 09:23 PM |
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How do you make a honda gx240 generator quieter
All ideas welcome, we've got a honda gx240 engine (240cc, single cylinder runs at 3000rpm) on a generator that is a bit noisey. As it sometimes
gets run for long periods we'd like to quiet it down
so what do people reckon, I think it's mainly exhaust noise as its exhaust is about the size of a tub of butter. so was thinking of getting an
exhaust off a 125cc commuter / moped. My question – If I went for a much bigger exhaust like off a Blade, would it be quieter because there’s more of
it to absorb the noise, or louder as it’s designed to vent considerably more exhaust gas?
All input appreciated!
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P ?
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| posted on 19/9/11 at 10:38 PM |
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depending on size and budget... box it in with wood and insulation might be the way, works a tread with our noisey office printer ...
did something similar on a narrow boat in the engine bay. 3" insulation worked a treat to cut down on a landrovers thud 
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HowardB
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| posted on 20/9/11 at 07:01 AM |
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may I suggest extreme care boxing it in, otherwise overheat is the likely outcome.
I would suggest that a simple one sided barrier might work, perhaps with some sort of foam on it, but even my the "silenced" gensets
aren't that quiet. Mine is about 60db, an open frame one is about 70db.
Much depends on where you might be using it, fixed at home during power cuts, or in a public space?
Howard
Fisher Fury was 2000 Zetec - now a 1600 (it Lives again  and goes zoom)
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wilkingj
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| posted on 20/9/11 at 08:32 AM |
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When I was on BT, the generators and pumps had an extension pipe (short flexi pipe) with an additional silencer. This did work quite well. Although
you might need to weld some sort of flange / suitable pipe / outlet to the existing silencer to be able to mate up the extension pipe. This would
give you the best of both worlds, as its removeable.
Agree with the above, these are air cooled engines, and need good ventilation.
Also agree with a barrier, I am a radio Ham, and on competition weekends in a field, we just put up a camper windbreak, and it does make a small
difference. You could use a denser material or that reflective heat sheet, use the shiny side towards the sound, it will reflect some of it back.
Also consider whats behind the genny, ie reflecting the sound back at you.
Bales of straw are good, if they are to hand, although watch out as they can be a fire hazard.
Have fun, and be safe.
[Edited on 20/9/2011 by wilkingj]
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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Confused but excited.
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| posted on 20/9/11 at 01:37 PM |
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Run it in next door's gagage?
Tell them about the bent treacle edges!
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rusty nuts
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| posted on 20/9/11 at 07:59 PM |
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Rubber mounts can quieten compressors , they may work with a generator?
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Ivan
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| posted on 20/9/11 at 08:16 PM |
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Lead the exhaust into the bottom of an open ended drum filled with 50mm stone.
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