|Racor R24 Fuel Filters
I also discovered that the R24 fuel filter comes in various microns. Like most people I have just been replacing the filter with a new filter of the same type. However my primary filter it turns out was a 2 micron filter and my secondary filter a 3 micron filter. This meant that the secondary filter was doing nothing.
Checking with the Yanmar web site Mike and I discovered that the recommendation was for a 30 micron primary filter and a 3 micron secondary. The good news was that the 30 micron filters are significantly less expensive than the 2 micron filters. So I ordered up a bunch of the 30 micron filters.
Fair winds and following seas :)