It is common practice in many amateur-built engine installations, from Rotaxes to Lycomings, to use K&N filters. They do a wonderful job of filtering the air, and they are reusable. However, they only are able to perform correctly if they are properly cared for. They should be cleaned annually at a minimum with K&N filter cleaner and then lightly oiled with K&N filter oil. Without the oil, which leaves a slight pink color on the filter, they will not filter properly. The one in the photo above was not oiled.
In Case You Missed It
2024 Engine Buyer’s Guide
Tom Wilson - 1
Costs are up and supplies remain tight, so plan accordingly.
Around the Patch
Editor-in-Chief Marc Cook highlights an intriguing product that caught his eye at AirVenture Oshkosh 2007, and he reiterates the difficulty of bringing new engines to market.
Product Review: BrightLine Pilot Bag
The BrightLine Bag is the ideal accessory for pilots who like a place for everything and everything in its place. By Marc Cook.