[AT] To oil or not to oil pre--filter

[Stephen Offiler]

Hi Mike:  I've never oiled any foam prefilter (to the best of my
recollection) and being dry I usually clean them with a shop vac (sometimes
compressed air, if it's not going to blow the foam apart).  I use the
shop-vac on the paper element too, tapping it on the bench or the floor to
shake the dust loose first.  I guess I'm kind of frugal in some ways.  I
don't buy very many replacement air filters for my small engines.  They
usually seem to clean up pretty decent.  And you know that a
partially-clogged filter is a BETTER filter in terms of filtration, as long
as it's not choking the engine.

SO

On Thu, May 27, 2021 at 4:31 PM Mike M <meulenms at gmx.com> wrote:

> Thanks Steve, that was kind of the way I was leaning, I usually clean the
> prefilter in a mason jar half full of gasoline, then let it dry, the oil
> just seems to gum stuff up.
>
> Mike M
>
> On 5/27/2021 2:58 PM, Stephen Offiler wrote:
>
> Personally, no, I do not oil the foam if it's sitting on top of a pleated
> paper filter.  It's only there to catch the big chunks.  On a mower, it
> gets all the long pieces of grass and other macroscopic-sized stuff and
> leaves the paper filter to do its job on the micro stuff.  In that
> prefilter role, oil doesn't help.
>
> SO
>
>
> On Thu, May 27, 2021 at 2:27 PM Mike M <meulenms at gmx.com> wrote:
>
>> I was just wondering whether you guys oil your lawn mower prefilter or
>> not, I usually do but it does seem to clog up the paper filter. After
>> all it's in Kohlers  best interest to sell filters.
>>
>> Thanks,
>> Mike M
>>
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