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Old 12-27-2016, 12:41 PM   #1
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Generator- typical fuel filter micron ?

Onan 20Kw diesel w/Racor 2010....what it typical element micron size ?
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Old 12-27-2016, 12:54 PM   #2
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You could use 30, 10 or 2 with likely no noticeable difference. I use 10's or 30's depending on my mood.
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Old 12-27-2016, 12:54 PM   #3
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Is there an engine mount filter as well?

If so I'd use a 10.
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Old 12-27-2016, 12:59 PM   #4
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I'm using 30u on our 12 year old Westerbeke primary, the builder says same. 10u would do fine too.
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Old 12-27-2016, 01:48 PM   #5
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Onan 20Kw diesel w/Racor 2010....what it typical element micron size ?
its going to vary greatly depending on mfg and fuel system.

for most cats. we run a 30m. primary and a 2m. secondary. when you see common rail fuel systems they will typically have more filters inline and smaller micron sizes. old pc nozzle fuel system are a lot more forgiving of dirt than the new high psi common rail stuff is.
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Old 12-27-2016, 03:22 PM   #6
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Is there an engine mount filter as well?

If so I'd use a 10.
Yes...a strange looking rectangular box with in and out holes that slide over in and out tubes, and then secured by snap springs.

What if I'm in the "mood" for a 30 ? ;-)
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Old 12-27-2016, 03:59 PM   #7
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I use a 10 on my Northern Lights which has an on-engine secondary of about 4.

Ken
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Old 12-27-2016, 05:09 PM   #8
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Yes...a strange looking rectangular box with in and out holes that slide over in and out tubes, and then secured by snap springs.

What if I'm in the "mood" for a 30 ? ;-)
You can use what ever you want.

I like to stop as much contamination as I can before it gets to the engine mounted filter.

I also prefer a larger element filter before the engine mounted one on a genset so I can use a 2 mic element without worrying about it clogging up prematurely.

But that's just me.
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