Prefilter on air filter ?

[Blind Old Coot]

Does anyone put a filter on their air filter? I put a paper shop towel on one just for giggles since I was tired of replacing them.

Found no change in spark plug color and has been much easier to clean. I still use compressed air to give a chance but it has been staying so much cleaner.

This is what it looks like with winter / lite use after a couple of weeks.

Any thoughts?

[CP241]

I'd think a shop towel may be a bit restrictive, but a prefilter doesn't usually hurt especially if you run in dusty or dirty conditions. I'd try and match it up with a mower air filter, they come with prefilters for that very reason. Get a foam one. Or you can get a sheet of UNI air filter element for cheap on amazon. You'll want to oil that, but just wrap it around like you did and hold it on with a couple zip ties.

Bar and chain oil works great for those. Dip it in, squeeze it out real good and it's nice and tacky. Itll catch everything and not hurt airflow

[StoveBolt]

I had a workhorse once that the air cleaner was vented through the fire wall, rather than in the engine compartment were the fan is sucking up dirt like a vacuum cleaner. It was a factory deal too, never seen another but it was a good idea.


Check out the louvers..
http://www.frontiernet.net/~irishhills/wh3.JPG

[Blind Old Coot]

The 1200 Refresher and the 1200 mud buggy ( workhorse)both have the air that come in at the vent via a hose from the outside. Yes, we're out in the country surrounded by fields too.

First couple of tries with the paper filter...so ..it's a tight squeeze with a secondary inner wall in the housing itself. Not much more than a paper towel will fit.

Yes, an oiled prefilter would be the way to go.....hmmmm....

Let me look.....

[CP241]

Originally Posted by StoveBolt

I had a workhorse once that the air cleaner was vented through the fire wall, rather than in the engine compartment were the fan is sucking up dirt like a vacuum cleaner. It was a factory deal too, never seen another but it was a good idea.


Check out the louvers..
http://www.frontiernet.net/~irishhills/wh3.JPG

Every workhorse I've had is like that. They were all newer though (2007ish) so maybe it's a mci CD pre-mci thing

[StoveBolt]

Originally Posted by CP241

Every workhorse I've had is like that. They were all newer though (2007ish) so maybe it's a mci CD pre-mci thing

Both mine were 01 st-350s CP, one did one didn't maybe that's when they started, both had the older
(pre-mci) rectangle filter with a place for a hose on the inlet... would be easy to convert I guess.

[Pauldeere]

I personally think bar and chain on is way to heavy of oil. Maybe K&N filter oil.???

[CP241]

Originally Posted by Pauldeere

I personally think bar and chain on is way to heavy of oil. Maybe K&N filter oil.???

After you ring out the filter, it's just a light coating. It's super sticky and catches pretty much everything. Used it for years on dirt bikes and quads, never had an issue.

The k&n oil is good for k&n type filters that are a woven material. But it's too thin to do much good on the filter media I was referring to. It's too porous. Uni Filter BF-2 12" X 24" X 3/8" 30-PPI Black Coarse Foam https://www.amazon.com/dp/B000ONZT5Y..._kx4gEbEANR01E

[raydhd]

Maxima FFT sells their own foam filter oil that is sticky like fly paper. I made up a UNI prefilter from their sheet foam to go over my K&N on my VC 460. It really keeps the intake tract incredibly clean even running here on sand islands. Also use the same oil the UNI foam filter on the Sled engine cart. It grabs debris far better than anything else I tried including the K&N oil. Pics of the build and finished product on pages 10 & 13 in my Vc 460 build. And pics of all 3 of my UNI and K&N 's on cleaning day on page 52.