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Primary Fuel filter

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kauppi	Primary Fuel filter		Lead	[-]
Posts: 19 03/31/06 11:07:15	Tags : None re: RACOR fuel filter Yanmar 4JH2E 1999 What should be used: 2, 10 or 30 micron filter?? Yanmar says 30 micron and 10 micron on the secondary filter. A very large Catalina dealer says 2 micon on the primary filter. Has anyone had problems using a 2 micon filter on the primary filter?? Thanks Dave Kauppi 636
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royalserf	Re: Primary Fuel filter	#1	[url]	[-]
Posts: 43 03/31/06 13:04:29	Use 30 micron as per recommendation of Yanmar. This protects the warranty. Others have used smaller filters with no problems that I know of recently, but some of the earlier engines had fuel starvation issues with the smaller filters. Both Catalina dealer in Deltaville, VA and Yanmar rep in Norfolk, VA told me to use the 30 micron Raycor and then the standard (whatever it is) Yanmar filter on the engine. So that's what I do. Fred Drummond Royal Serf #855 2 Cabin C/L Wing Keel
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kauppi	Re: Primary Fuel filter	#2	[url]	[-]
Posts: 19 03/31/06 15:13:41	Fred Many thanks Dave Kauppi Avalon 636
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mjk	Primary Fuel Filter	#3	[url]	[-]
Posts: 43 04/05/06 16:04:54	I've used the Racor 2 micron on the separator since the boat was new - 1989, and the standard Yanmar secondary filter with never a fuel starve problem. Key is to keep the fuel fresh. I change the primary filter every 120 hours - more often than needed probably - and I use Biobar and never fill the tank beyond 1/2 unless we're taking a long trip. This keeps the fuel fresh and eliminates most of the crap that forms in old fuel, biobar or not. Using the boat year-round here in FL eliminates the need to add storage junk and spring start-up junk - which contribute to sour, black fuel which clogs filters. MJK Splash Dancer II #94
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melelana	Re: Primary Fuel Filter	#4	[url]	[-]
Posts: 327 04/06/06 04:16:03	The purpose of the filters is to ensure you are getting clean fuel to the engine. The Racor separates water and provides and initial filtering. The engine mounted Yanmar filter provides fine filtering at the engine. If you use a 30 micron filter in the Racor, you remove water and larger particles from the fuel and the Yanmar filter takes care of the fine particles. If you use a 2 micron filter in the Racor, there's no reason to ever change the 2 micron Yanmar filter. Anything that gets past the Racor will also get past the 2 micron Yanmar filter. Most mechanics recommend a "defence in depth" approach where you use a 10 or 30 micron filter in the Racor as a "pre-filter" and the engine mounted Yanmar filter as the fine filter. Larry Melelana Catalina 42 # 175' 1990 3 cbn, wk. Solomons, MD
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