T&T: 2 10 30 Micron Filters??

[Bob Peterson]

Phil, that's the same advice I received from Cummins over three years ago.
I reported it here, and of course, had it torn to shreds by the
self-appointed experts who know better.

Bob Peterson
"Lopaka Nane"
47' Lien Hwa CPMY
San Francisco 

-----Original Message-----
From: trawlers-and-trawlering-bounces at lists.samurai.com
[mailto:trawlers-and-trawlering-bounces at lists.samurai.com] On Behalf Of Phil
de l'Etoile
Sent: Sunday, December 30, 2007 10:59 PM
To: jeff at activecaptain.com; trawlers-and-trawlering at lists.samurai.com
Subject: Re: T&T: 2 10 30 Micron Filters??

Thanks for the opening Jeffery:

Last week when I had a Cummins mechanic on board trying to solve several
problems, he was quite stern about the fact that I shouldn't be using 2
micron filters.

My response was "please tell me why".  "Tell me somethig other than because
the manufacturer says so".

His reply was that the fuel lift pump doesn't handle the increased
resistance
well.   The lift pump pushes much, much, better than it pulls, and it is
pulling on the primaries and pushing on the secondaries.

We never did discuss the possibility of moving the lift pump to in front of
the primaries, but he did say that because my engine was so small (150 hp),
the pump could probably handy 10 microns, although 30 was the correct
number.

Now this may have come up in previous discussions here, but it was the first
time that I recall hearing it.   Maybe I should say it was the first time it
registered.

Phil de l'Etoile
West Sacramento, CA