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Old 01-10-2018, 11:30 AM   #16
MAXUM
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Depends on how elaborate you want to get. I personally have done neither but offer these two options I have seen which are quite effective.

1. Buddy of mine fabricated a pretty interesting solution. The existing muffler just screws into the engine block, he removed that, took a piece of threaded pipe that fit the block port it's I think either 3/4 or maybe 1" and extended it out beyond the generator housing. From there he bought a threaded piece that took it from the diameter of the pipe coming out of the generator to something like 2.5 or 3" in diameter. From there he threaded about a 4 inch cut to size section of the larger diameter pipe into it. He then went down to the auto parts store and bought a cheap car muffler and slips that onto the 4" section sealed with a muffler clamp. He did weld on a couple pieces of angle iron to support the end of the muffler. SO at setup all you have to do is slip on the muffler and tighten the muffler clamp. It's amazingly quiet. If you so desire you can put a nice chrome tip on the exhaust end :-)

2. My neighbor constructed a three sided box made of plywood with a weather proof roof made of corrugated aluminum. He lined it with fire proof foam similar to what you see inside the engine cover of a boat. Ample breathing room must be considered here! Generator is put inside the box exhaust facing out, turn box away from the house, run and enjoy. The box cuts the noise down quite a bit. The nice thing about this setup is that he has ample overhang to really protect it from foul weather during operation. The box is held together with door hinges so you can pull the pins and disassemble it storing it flat while not in use.

Option #2 is actually pretty cool and I've thought about doing something like that myself. Of course like anything ideas like this can be certainly modified and improved to one's taste.
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