Just something I had my eyes opened up to cleaning this air filter.
'50 8n. First job was a career in the parks dept as a mower, retired and went to work on a hay farm. I got it sitting in the dust up the road.
Pulled the lower mesh element and started cleaning. Oil all out, still looked like a white felt pad on the bottom 1/4" of element. Unrolled for a better look and it is fine hairs of grass all wrapped around the mesh!! Anyways I found this interesting and worth passing on.
I replaced the element and now runs good wth plenty of air!!! And yes , I did find flies & other insects up in the can. Rusty