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Old 30-12-2014, 06:46   #1
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Racor Filter element

I have a Yanmar 3YM30 engine with a Racor 500 filter What is the best element to use a 10 Micron or 30Micron? know it is not the 2Micron
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Old 30-12-2014, 07:20   #2
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Re: Racor Filter element

It's a pre-filter of course used to get all the big bits out so the final filter doesn't clog as quickly.
I belive most use a 30, but either will work, the 10 will clog a little quicker, but will remove more trash and keep the final filter from having to catch so much.
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Old 30-12-2014, 07:35   #3
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Re: Racor Filter element

Like A64 was trying to say... Depends on which filter you'd like to change the most...

30 will mean most of the stuff will get caught in your engine filter....

10 will mean you have to change the Racor more frequently...
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Old 30-12-2014, 07:44   #4
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Re: Racor Filter element

Fwiw I use a 2 micron and never change the engine filter.


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Old 30-12-2014, 08:02   #5
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Re: Racor Filter element

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Fwiw I use a 2 micron and never change the engine filter.


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One boat has a 10 that I haven't changed in years... Change interval and supply health is indeed relative...
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Old 30-12-2014, 10:53   #6
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Re: Racor Filter element

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Fwiw I use a 2 micron and never change the engine filter.
+1
Changing the Racor filter only means I do not have to bleed the engine so much quicker to do in an emergency

Also I have fitted a vacuum gauge which has saved me serious bucks avoiding unnecessary filter changes
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Old 30-12-2014, 11:03   #7
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Re: Racor Filter element

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Originally Posted by Sailmonkey View Post
Fwiw I use a 2 micron and never change the engine filter.
Check some of the other threads on this here. Be aware that several engine manufacturers specifically warn against using 2 micron primary filters, and void warranties if they are used.

The point of a primary filter is not to avoid ever having to change the secondary.

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Old 30-12-2014, 11:25   #8
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Re: Racor Filter element

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Check some of the other threads on this here. Be aware that several engine manufacturers specifically warn against using 2 micron primary filters, and void warranties if they are used.

The point of a primary filter is not to avoid ever having to change the secondary.

Mark


This is how I understand it and have seen the same recommended by most mechanics.
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Old 30-12-2014, 11:44   #9
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Re: Racor Filter element

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Originally Posted by colemj View Post
Check some of the other threads on this here. Be aware that several engine manufacturers specifically warn against using 2 micron primary filters, and void warranties if they are used.



The point of a primary filter is not to avoid ever having to change the secondary.



Mark

My engine is well past warranty, and consumes less than 1/2 GPh all while moving less than 10 GPh all on a filter rated at 60 GPh with a 2 micron filter.


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Old 30-12-2014, 11:45   #10
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Re: Racor Filter element

I can't find the threads that indicate warranty void with 2 micron fuel filter. Can someone include a link please?
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Old 30-12-2014, 12:04   #11
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I was at a Yanmar Macboring class last year. They advised not using less than 30m on the filter prior to engine fuel filter. Something about creating too much "draw" pressure.

I wish I took better notes on this particular bit of advice.

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Old 30-12-2014, 12:06   #12
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Re: Racor Filter element

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I was at a Yanmar Macboring class last year. They advised not using less than 30m on the filter prior to engine fuel filter. Something about creating too much "draw" pressure.

I wish I took better notes on this particular bit of advice.

Greatketch33

I would call "draw pressure" a vacuum.


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Old 30-12-2014, 12:07   #13
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Re: Racor Filter element

I had the same advice but it was no less than a 10m.
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Old 30-12-2014, 12:15   #14
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Re: Racor Filter element

If the vacuum gauge doesn't move I don't see how my massively oversized filter is starving the engine.


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Old 30-12-2014, 12:16   #15
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Re: Racor Filter element

Quote:
Originally Posted by Sailmonkey View Post
My engine is well past warranty, and consumes less than 1/2 GPh all while moving less than 10 GPh all on a filter rated at 60 GPh with a 2 micron filter.


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We have used 2 Mc Filters in our Racor FG500 filters on two different boats since 1987 without any difficulty over thousands of miles and hours of running time. If one changes one's filter element at regular intervals (we do at 100 hours) there doesn't seem to be any problems. For the sake of the exercise, on one occasion when we changed our filter element I cut it apart to compare with the 10 Mc filter element on a neighbor's boat who was also changing his at the same time. Our's had somewhat more detritus than his but both elements likely had several hundred useful hours of life left.

On the matter of "warranties" being voided by using 2 Mc filter elements, I have yet to have any confirmation of that from any engine dealer and we have asked numerous reps at various boat shows over the years including those for Yanmar, Beta, Westerbeke, Perkins, Kubota, etc. I think the allegation is a myth, perhaps perpetrated by OEM filter element resellers?

FWIW...
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