On my Pathfinder, I use a coarse (30 micron) filter as the first in line
filter from the tank (I always forget if that is primary or secondary). The
next one is finer (a Bosch as per specs). The coarse filter does the job in
getting out the big chunks and the finer filter is working of the finer
grit. That way the filters should fill up about evenly

--
Dennis Gibbons
S/V Dark Lady
CN35-207
email: dennis dash gibbons at worldnet dot att dot net
"Doug Dotson" wrote in message
...
Several years ago I repowered my prev boat with a Yanmar 3GM. A few
weeks later I received a notice from Mack Boring that use of a filter
smaller than 30 micron places stress on the lift pump and that use
of such a filter would void the warranty. I started using a 30 micro (red)
element and changed the on-engine filter more often. This spring
while returning from the Bahamas, we lost our engine (Perkins) and
had to be towed the last few miles to Palm Beach. Turns out that
the lift pump failed. Mechanic at Ribovitch-Spencer said that it is
true that too small of a filter can cause lift pump failure. He
recommended
at 30 micron as well along with changing the on-engine filter
regularly.

Doug
s/v Callista

"Marc Auslander" wrote in message
...
these are really nice, I always try to drain the bowl......


I've had several recommendations for the Raycor 500 series. Thanks.

As a primary filter (my engine has a built in fuel filter) to you use
the 2 micron or the 10 micron element? I would think that given the
size of my engine (Yanmar 2GM) I should just use 2 micron even though
its the primary filter.

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