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Old 05-03-2014, 11:20   #1
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Yanmar 3HM replacement air filter options?

The original air filters (Intake silencers) on our 3HM35's are in ragged shape. It's a hassle and expensive to import them. They are these conical foam elements on a perforated aluminum frame.

Does anyone know of an automotive or other equivalent? I know I've seen conical filters on Rotax aircraft engines but those would be even harder to find here. Something NAPA or a CarQuest might stock could be likely if I could find one.

I've also thought about buying some foam rubber and making my own but would prefer a professionally manufactured one.
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Old 05-03-2014, 11:38   #2
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Re: Yanmar 3HM replacement air filter options?

Hi Canibl I have replaced my air filter a couple of times here in Australia with a Yanmar part at a cost of $AU45 and cried all the way home so this year I took the filter to the local foam shop and bought the exact foam ( enough for several replacements) and made my own for a couple of dollars. Good luck Jacko
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Old 05-03-2014, 11:44   #3
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Re: Yanmar 3HM replacement air filter options?

Try the hot rod breathers. There's a bunch out there... maybe someone like JEG's...
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Old 05-03-2014, 12:13   #4
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Re: Yanmar 3HM replacement air filter options?

The good conical ones are made by K&N, they are cotton gauge soaked in a special sticky oil, if cleaned correctly and re-oiled, they essentially last forever.
Now your current "air filter" may be a silencer as well, so going to an aftermarket filter may increase the noise level.
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Old 05-03-2014, 12:33   #5
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Re: Yanmar 3HM replacement air filter options?

Yanmar calls them intake silencers. Conical elements inside a can with a long scoop intake.

I'm guessing the can is the silencer part. The element on one is about a half inch of foam sheet. It's hard to know if the depth of the foam is important for the noise. I think I'll try Jacko's approach. Surely the local upholstery guy will have foam rubber in various sheet thicknesses. This looks to me like about a six-pack's worth.
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