Making a small engine quieter.

brendonv · August 25, 2011, 03:31:47 PM

I have a small Honda 9 horse on my log loader, brand new muffler, still freaking loud! It's the same issue with my Honda powered power washer, but I care less about that.

Anyone have any suggestions of what kind of muffler setup I can add onto it? I was thinking of figuring something out with an adapter from the current muffler to a car style muffler.

Any ideas?

Magicman · August 25, 2011, 04:33:35 PM

Most times it is not the muffler. It is the internal noise from the engine itself. A padded box will work, but then you will have ventilation/cooling issues. A baffle/screen between you and the engine will help some. There just is not an easy fix.

If you are interested, PM me and I will send you a link from http://www.rv.net/ concerning quietening generators.

POSTON WIDEHEAD · August 25, 2011, 05:04:10 PM

Ear plugs maybe? smiley_big-grin2

Ianab · August 25, 2011, 05:20:48 PM

Something like this?

Stu does a bit of Chainsaw Milling in central Tokyo, so noise is an issue.

Modding a Husky 185 saw with a Honda 250cc bike muffler.

http://www.ablett.jp/workshop/csm2.htm

Otherwise? Yeah - Earmuffs. :D

Ian

Magicman · August 25, 2011, 06:05:21 PM

Here is the link to professor95's noise reducing enclosure.

http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/15131645/gotomsg/20415669.cfm#20415669

brendonv · August 25, 2011, 08:52:41 PM

Thanks for the links, I'll do some reading.

I just might be getting old, I don't know. I have muffs on all my hardhats, and a pair of ear plugs in the back pockets of every pants I put on.

The freaking thing is just obnoxious.

rbarshaw · August 26, 2011, 03:47:46 PM

I have put a small car muffler on a small engine before, it works well to lower the noise level, just adapt and braise/weld till it fits. also consider support for the muffler so it does'nt tear apart the connection to the engine.

Don_Papenburg · August 30, 2011, 09:32:48 PM

Use schedule80 pipe . the thick wall make a mellow sound. The longer the pipe the quieter it will be.

maple flats · September 05, 2011, 07:38:35 AM

Check out the super mufflers they sell as after market units to make an ATV lots quieter. Either one of those or something rigged to connect up the same should work. Just don't restrict the exhaust flow or you will burn the valves.

scsmith42 · September 05, 2011, 12:58:11 PM

Brendon, I built a muffler a few years ago for an old Onan single cylinder engine, and it turned out very well. Attached is a link to my post (second one from the last details the construction).

Scott

https://forestryforum.com/board/index.php/topic,41136.20.html

brendonv · April 26, 2016, 03:51:25 PM

Bumping this. Now i have a loud 24 horse honda to tame the noise on.

celliott · April 26, 2016, 04:30:08 PM

I'm pretty good at making them louder ;D
Sorry can't be much help.

John Mc · April 26, 2016, 04:40:49 PM

Try a Super Trapp Muffler They make a noticeable difference compared to the factory muffler on most small engines. The "Model Selection Guide" link on that page gives more info on the noise difference.

scgargoyle · April 27, 2016, 06:10:33 AM

I'm not sure how they did it, but my 13 hp Honda generator is super quiet. It's still an air-cooled engine, so it must have a heck of a muffler.

r.man · April 27, 2016, 07:57:44 AM

I expect it is just an expense issue, if you are willing to pay it can be quiet. I use to use an old, old generator, it was old 30 years ago. Screw in tube muffler sounded like successive firecrackers when it was running. One day I had to be near it for hours and I was driving an old truck with the muffler/tailpipe just wired on from something else. I popped the muffler/tailpipe off the truck and slid the tailpipe loosely over the tube muffler. It made a world of difference. I would like to do something like that with my wood splitter plus point the exhaust out up high. Probably should have one of those exhaust flex joints that some cars use at the transition from the motor to the exhaust.

Kbeitz · April 27, 2016, 08:29:47 PM

Just playing around one day with an old engine I had that had no muffler.
I screwed a short 2 foot chunk of stainless steam flex pipe in the muffler hole.
Wow did I get an surprise. It was like putting a cadillac muffler on it.

Joe Hillmann · April 28, 2016, 03:12:49 PM

Putting on a small automotive muffler will quite it somewhat. It also helps to point the exhaust away from where you operate it from.

brendonv · April 28, 2016, 04:56:32 PM

Thanks. Ill get a elbow and send the noise into space. Maybe next try a muffler added to that.

I guess it beats the noise of a chainsaw, a conveyor, a splitter, and a grapple trailer. Just took possession of a crd processor, so now its just a 24 horse honda and the grapple trailer with the 13 horse honda.