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post #1 of Old 11-01-2019 Thread Starter
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Racor fuel vacuum guages

I am wondering what you advise regarding the value of Racor fuel vacuum guages to assess how clogged the primary fuel filter is. I think that the guages sense the pressure or vacuum between the primary fuel filter and the secondary filter on the engine. One recent Racor guage model has a second needle that records the most vacuum encountered since reset, so I could read it as part of my routine prelaunch engine check. My Crealock 34 has an electric fuel pump in addition to the pump on the engine, so there would be vacuum at the guage only when the primary filter is significantly clogged. Still, I am considering adding one so that I get some warning. (New owner, four year old fuel tank that hasn't been cleaned, at least two year old fuel, biocides added)
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