On Sat, 08 Dec 2007 04:50:48 GMT, Rich Hampel
wrote:

Ive been deeply involved in filtration engineering for the past 30
years so I just thought Id remove a lot of the common misperceptions
especially about 'boat filters' with these posts.

Rich, while you are here, perhaps you could comment on the question of
what micron rating to use in Racor filters mounted ahead of a 2 micron
engine mounted filter. The trawler groups have thrashed this one to
death, and we've touched on it here a couple of times.

In most cases the Racor is much easier to change than the engine
mounted filter leading some to believe that the Racor should be 2
microns also. I've come full circle after reading some of these
discussions and have started using 10 micron Racors and changing them
when they begin to show a significant vacuum guage reading. I've had
no issues with clogging the 2 micron secondaries on the engine and
just replace them once a year as routine maintenance.