My primary fuel filter on my Lehman engines are Racor's with 10 micron filter. The Double secondary filter cans are Baldwin BF825's and are 8 micron at 50% efficiency. I have been told the secondaries should be 2 micron. I have been unable to find any filters with this rating. I was thinking of replacing the double bank with a Racor but have been told they don't work well under pressure from fuel lift pump.
Would appreciate any comments on this.
I was thinking I could put a second Racor in series with the Primary Racor-not sure if that would make sense.