Finally got around to fabricating the air filter. My design considerations were low weight, compact size, inexpensive, and easy to access with no tools required.
The original filter was a simple, rectangular box, with the air cleaner being an integral part...in other words, it wasn't possible to change just the element itself. I didn't like that, as it's bound to translate into higher costs. And in fact, the o.e.m. filter retails for around $22-$26. To be fair, the original unit is probably a hepa filter....not needed for an aeration application, so no reason to pay for that.
Original unit on left, my design on right. Both utilize 3/8" female pipe threads.
Some of you undoubtedly recognize my filter choice as being used on a pushmower engine. I calculated the displacement of the compressor at around 92cc's, and the filter is intended to flow adequate for a 190 cc engine....sounds good to me.
All of the components. When installed, a simple 60 degree rotation of the filter housing will unlatch it, and it will pull straight off. Reverse for installation.
Height of original element.
New element.
All of the components. I have about $20 in a one-time shot for everything, with replacement filters running $5-$6.
