swirl type spark arrestor

I will answer my own question. after much research i found the patent and dome drawings of the swirl type spark arrest. it doesn't use any screens that can plug but it does use centrifugal force to separate the solids from the exhaust stream. the plug in the side rear of the muffler is placed so that when removed and the exhaust is flowing the solids will be forced out of the muffler. and Kubota recommends tapping on the side of the muffler to dislodge any solids that might be stuck to the sides of the muffler.
 
Interesting. And, I suppose that satisfies any National/State Park requirements for spark arresters? Just asking. Also, wonder how the "swirl" system works in practice? Some folks have had serious issues with their spark arrestor screens plugging and causing a loss of power.
 
aurthuritis said:
I will answer my own question. after much research i found the patent and dome drawings of the swirl type spark arrest. it doesn't use any screens that can plug but it does use centrifugal force to separate the solids from the exhaust stream. the plug in the side rear of the muffler is placed so that when removed and the exhaust is flowing the solids will be forced out of the muffler. and Kubota recommends tapping on the side of the muffler to dislodge any solids that might be stuck to the sides of the muffler.
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Thank you for posting this information. I have the old style but am sure many new owners can use this new information. collie
 
I still find them a useless regulation.For many years they didnt have them and there was rarely a fire from them if any.I still think its a useless regulation and just a way for some politician to make money.
But im very critical of our useless GOVT.
 
I have this same one and I don't like the idea of removing a little plug and tapping on the muffler while running to clean it out. Would rather have access to the inside.

Has any one replaced with an after market muffler that you know of?
 
pop58 said:
I have this same one and I don't like the idea of removing a little plug and tapping on the muffler while running to clean it out. Would rather have access to the inside.

Has any one replaced with an after market muffler that you know of?
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I understand and share your concern, but after looking at the design drawings I have a little more faith in this type. the design is supposed to make them more reliable and have less maintenance than the screen type. I will keep tabs on this as i use the RTV.
 
Once again,,new stuff is just old stuff recycled. I have owned more then one exhaust system over the last 50 years that was cleaned the same way. Take out the plug,,beat on muffler,,watch it spit junk out,,,replace plug.

It actually works decently. Had a few 2smokers that didnt work as well as the 4 strokes,,,due to oily exhaust.
 
most of the information i found was from the 1950's. and for industrial equipment. actually for the design to fail the whole muffler would have to fill with stuff.
 
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