"Keith" wrote in message ...
I use 2 micron in the primary and final. Since my fuel is clean (polishing
system) I want the primary to catch pretty much everything, since it's
easier to change. This is for a Lehman 135.

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Keith
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Before Xerox, five carbons were the maximum extension of anybody's ego
"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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Always use the filter type the manufactorer reccomends. Polishing (BS
in my opinion) or not, a filter causes restriction. You need fuel flow
in a diesel, if you restrict the flow by going to a tighter filter,
your asking for trouble unless you go to a larger filter that will
flow the correct amount of fuel. If your not getting the proper amount
of fuel flow not only will you cause wear on the pump, you will also
get reduced power output. This is simply one of those cases where more
is not better.