Dennis Gauge
ArboristSite Operative
After the used "clogged" filter dried out I checked it with compressed air. It seemed OK, both easy air flow in and easy out, as if nothing was clogged. The air flow through it was the same as other brand new, unused filters. So, my question is, can any fuel filter be checked in advance by using air flow? Seems like that failed in this case.
Compressed air is at a whole lot higher pressure than fuel. You could very easily have blown a hole through the clogged filter media with it, which of course would let air flow freely.