GoldenDawn
Senior Member
I have a pair of Racor 500 filters (vintage 2001) in my KK42 and was doing my pre-season inventory of filters today. I noted that I have both types of filters (2010-2) - one with teeth and one with a tube (see upper photo). It is my understanding the "toothed" version requires the rubber spacer (see lower photo) and the "tube" version requires no spacer. A couple questions: 1. these would seem to function quite differently and I am not sure how that would work? and 2. I think the "tubed" filters are the newer version?