Generator muffler

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Old 02-26-06, 08:36 PM
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Generator muffler

Is there a way to make a 10 hp B&S generator engine quieter? Like a better muffler or muffler attachment?
 
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Old 02-26-06, 10:27 PM
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Most generators are made quiet by placing them in a small doghouse-sized cover for a stationary installation. The exhaust can be directed into a buried barrel with a separate exhaust stack. Exhaust gases are most of the noise produced but not all of it.
Same thing applies to an air compressor.
 
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Old 02-27-06, 05:22 AM
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I've never heard of that but I like the plan. Can you provide more detail on the buried barrel (size and how much of the barrel is buried) and how the exhaust gets routed there?
 
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Old 02-27-06, 06:16 AM
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I've got the same engine on a portable generator and it's loud. I haven't used it much for the past couple years, but I've been planning to find a small car muffler to install on it - guess I haven't done it because I don't want to take the time if it doesn't work.

The barrel Idea sounds good for a stationary unit.
 
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Old 02-27-06, 01:13 PM
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I would be leary of installing an oversized muffler. I don't know for sure but would think that the added restriction might affect the way it runs. IMO the best way is to divert the exhaust [with pipe] further away thus directing most of the noise in a different direction.
 
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Old 02-27-06, 04:19 PM
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You really do NOT want to put the weight of a muffler on the threads just outside the exhaust valve - too much weight. Put whatever muffling device - auto muffler, barrel in the ground, etc. on a separate support and connect the two with flexible metal exhaust pipe.
 
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Old 02-27-06, 04:23 PM
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Here's a home-made (obviously) barrel muffler design: http://utterpower.com/muffler.htm

You would need to adapt the plumbing to the size of exhaust pipe that you have. It is a stationary-preferable solution.
 
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Old 03-10-06, 07:01 PM
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I put a car muffler on an 8hp generator about 10 years ago. The generator was extremely loud to begin with and the oversized muffler made little difference. There was a lot of noise coming from the intake (sound getting out through the carb.), and there was a lot of noise coming through the case (I assume valves clanking). Hopefully you will have better luck with a more modern engine.
 
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Old 03-11-06, 06:29 AM
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Generator noise

Should have bought a Honda inverter...
 
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Old 03-11-06, 06:51 AM
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The Honda and Yamaha inverters seem to only come in the smaller sizes - 3500 watts seems to be the limit. I did observe a water-cooled Honda 6500 was much quieter and there are Hondas that are fully enclosed.
 
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Old 03-12-06, 04:28 AM
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. . . but pretty expensive.
 
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