Gong show, can you elaborate on this? I assume the inline fuel filter on outboards is 10 micron? the inline filter on outboards is small..wouldnt it be better to also have the water/fuel separating filter to also be 10 microns since its a significantly larger filter and can capture and hold more? so the only thing that should get into the inline filter is any sediment from within the fuel line post first filter and should normally be fairly clean since the majority of the work has been done by the first(fuel/water) filter? Perhaps my logic is off...Makes no sense to have your primary and secondary filters the same micron.
First filter at 25, second at 10.
your attachment didnt come through so I cant see any info on the article you attached. How do we know whether the micron rating for a fuel filter is nominal or absolute. I usually only see the number(10,25 etc) and then micron. dont recall ever seeing absolute or nominal.This micron discussion misses an important point. There are two ways of using the micron rating in fuel filters: absolute and nominal. Cheaper filters will describe their products using the nominal definition. That means lots of bigger particles can pass. A 10 micron nominal is probably worse than a 20 micron absolute filter.
Mobile_The_Micron_Rating.pdf
Sorry, just copy and paste. It's from Racor. This paragraph was most interesting:your attachment didnt come through so I cant see any info on the article you attached. How do we know whether the micron rating for a fuel filter is nominal or absolute. I usually only see the number(10,25 etc) and then micron. dont recall ever seeing absolute or nominal.