Yanmar Secondary fuel filter

If I recall correctly a Tugnut had Yanmar Secondary fuel filters for sale at Roche Harbor at the Rendezvous. If I'm correct I'm looking to find out if any more are available. If the person that bought a large quantity of these filters and was at Roche reads this, or if someone knows this Tugnut, PM me the info as I'm in the market....should have bought then!

Jim F

As a replacement for a Yanmar 120651-55020 you might consider a Parker Racor R90-DS-RAC-01 or a Mann Filter WK 1150.

Has anyone used the replacement filters? I bought one, but I am hesitant to use it until I can confirm that it has the same filtering abilities.

Mike, I used the Parker/Racor R90-DS-RAC-01 at my last fuel filter change, 200 hours with no issues. I've started to look for one but have not found one yet.

Jim F

Per a Racor cross reference sheet The Liebhear 10044303 or the Fleetguard FS19897 can be used. Then if one looks at the Mann WK 1150/2 cross references the Liebhear and the fleetguard show up. The interesting world of fuel filters! Probably if one was to dig deep enough there is a factory in China making them all and just putting different stickers on them.

Greetings;

I am re-visiting and updating this thread and also asking a question.

A quick summary: For the owners of the Yanmar 4BY and 6BY engines, the secondary water/fuel filter, 1200651-55020, costs about $140. Many owners have been successfully using the equivalent filters that have other names on them. The equivalent Racor filter is now no longer available. The equivalent Mann filter (WX1150/2) is either no longer available or very hard to find. Cross-referencing these have found two other filters, John Deere/Liebherr 10044303 and Fleetguard FS198997 made by Cummins; each costs about $70.

For the Yanmar owners with this engine, what is your experience with these filters?
If you are not using a Yanmar filter, which filter are you using?

Did you try e-bay. Go down the page there are some Mann filters listed https://www.ebay.com/sch/i.html?_fr...3.TR0.TRC0.H0.TRS0&_nkw=120651-55020&_sacat=0

Some time after my earlier post of Oct 2016, I ordered a Fram P11057. The "Fram" box contained a Mann Filter WK 1150. It seems that the two are same. However, I ran into a problem when attempting to install the WK 1150 on my 4BY-180. The WK1150 is a little longer than a Yanmar 120651-55020. The extra length of the WK 1150 caused to filter to bind against the adjacent ECM mount. The contact was sufficient to scrape off paint from the filter but not to dent filter body. The point of contact was on the side of the filter, about 1/2 inch from the bottom of the filter. If I had forced the filter further on, there would have been clearance. I choose not to and ended up using the Yanmar. Before the next filter change I may "modify" the ECM mount.

When you consider the intricate parts the filter protects the Yanmar filter is cheap insurance. Yanmar is the correct size and the micron rating is what Yanmar recommends. From time to time I have found them reasonably priced online, when I come across them I stock up. My reasoning is I spend a lot of $$$ on a boat, no sense in cutting corners on an essential item.

Two other options I found are a Wix WF10213 for $62 and a NAPA 600213 for $60. Haven't tried either but they are widely used on fleet trucks. from my research.

bakerboat":8g5f0keo said:

Two other options I found are a Wix WF10213 for $62 and a NAPA 600213 for $60. Haven't tried either but they are widely used on fleet trucks. from my research.

Click to expand...

The thing I find most important are the microns and you can never seem to get that answer.

I own a YANMAR 6BY and have looked into alternative fuel filters not because of price but because the OEM Filter is EXTREMELY difficult to change on this engine. There is a tiny gap between the side of the filter and the ECU bracket making it impossible to slide a traditional belt type filter wrench. Because of the large size of the filter and its round bottom, it is impossible to fit the type of tools that will grab the bottom of the filter. A couple of times I had a stuck filter in there and it took me hours to get them out. My research for alternatives has led me to the MANN WK 1150 2 which has an hexagonal head on its bottom making removal a breeze compare to the OEM. I confirm what has been said before, the MANN filter is a little bit longer than the OEM but on the YANMAR 6BY it fits perfectly. I agree with the comment that has been made before: common rail injection systems are very sensitive to fuel cleanliness and therefore saving money with a cheap filter is no a good idea. Now that I had confirmed fit, the remaining question was: Is the MANN a good alternative to the YAMAR 120651-55020 in terms of filtration efficiency? I have obtained the detailed specs of the MANN WK 1150 2 which indicate that it has a filtration efficiency of 98.6% @ 3-5 μm based on ISO/TR 13 353. I have also obtained PARKER RACOR documentation which indicate that "New high pressure common rail fuel injection systems require high efficiency in removal of small particles. The requirement is 95% for 3 micron particles" (If you cut and paste the quotation in Google you will find my reference, it is a pdf document by RACOR PARKER called The Micron Rating). In another publication PARKER RACOR indicates that its 2 Micron Filter has in fact an efficiency of 98% @ 4 Micron. (http://www.racornews.com/racor-faq). All this to say that when filter manufacturers refer to a "2 micron filter" for common rail applications, the actual filtration efficiency of the filter, is to block particles slightly larger than 2 micron. Based on all my research I felt that the MANN was very close but I was still not 100% certain about the 98.6% at 3-5 Micron, was the potential for 1.4% of 5 micron particles detrimental to my expensive common rail injection? I tried to get YANMAR to share their specs for the OEM filter without success but I was able to send the MANN WK 1150 2 specs to their lead European technical support person who confirmed the following in an email: "While I cannot Recommend that you replace our standard fuel filter with this one (meaning the MANN 1150/2), I can confirm that a filter for 3-5 Micron is enough to keep your fuel clean and is within our specs". I also made an enquiry with MANN HUMMEL support and this was their answer: "we always ensure that when we are not the OE supplier, our filter is atleast equivalent to the OE specification. As the WK 1150/2 was a direct match to the Yanmar OEM cross reference, I do believe that this is the filter you require". There are no certainties in life but on the basis of my research, I believe that the Mann WK 1150 2 is as good a replacement of the OEM as it gets. My wife and I are preparing for a circum navigation around the world with our sailing boater and I can't afford to get stuck in far out places. In my spare parts I no longer have the YANMAR OEM filter but in its place I have 6 MANN 1150/2. They are not that easy to get but you can still find them on eBay or other internet suppliers both in the US and the EU. Lastly, because the quality of the fuel we will get is some places around the world can be very poor, I have installed a fuel polishing system on my main tank. The system pumps fuel from my tank, filters it through a 10 Micron Racor filter and returns it to the tank. Every time we fill up, I run my polisher for a couple of days. It is always on when the engine runs. I also have a RACOR 2 Micron primary filter ahead of the on engine filter. Because the fuel gets polished at 10 micron, my 2 micron primary filter does not clog any faster than before and has greater water separation capabilities than the 10 and 30 alternatives. Hope this helps some of you making a decision!

Nice research! By the way, I overcame that difficulty of the strap wrench getting hung up. If you look hard enough it is a screw that fastens the ECU to the bracket. It sticks out past the bracket. I was able to fit a hacksaw blade in between the filter and the bracket and trim the screw flush with the bracket. Much easier sliding the filter strap up and off again.

Yanmar parts availability for our mature Tugs is not going to get any better. Our Journey has been using the Mann 1150/2 filters for 4 years now. Have two 1150/2 filters remaining in my spares stockpile. Just purchased 2 more of the 1150/2 filters on ebay for a net of $70 each. Two years ago they were running under $50 each. Three of them left from a USA based eBayer with a 99+ feedback rating.

I just installed a Mann WK1150/2 filter on our 4BY2-180. It was not totally uneventful, but worked out just fine.

As mentioned by others, there was a Yanmar screw that stuck out just far enough to prevent threading the filter on - cue the conspiracy-ists. I took this screw out and still couldn't get the thing on. I loosened the two big filter mounting bolts and was able to move the mount towards the center-line of the boat quite a bit and snugged it back down. The filter then spun on easily. I shortened the offending bolt by about 1/8" and reinstalled.

This filter had a nice hex drive feature on the bottom that will make installation/removal a breeze. No more strap wrench. A major improvement.

I keyed the engine a couple of times until the fuel pump sounded happy. Then hit the starter and it lit right up and ran great. Easy.

Brendan

I found this Mann WK 1150/2 currently priced at $40.16. Since it's so much less money than mentioned in previous posts I'm concerned about ordering. Is this the filter that people have used on their 6BY 260? https://www.dieselfiltersonline.com/wk- ... k1150.html

This is the filter replacement for the 4BY-2 It is most likely the same for the 6BY, but can't attest to it. Can you cross reference the numbers? The secondary filter part number on the 4BY-2 is 120651-55020. Check yours and see if it is the same number.

Yes, Knotflying, that is the part number for the 6BY 260. Jackpot! I never find boat stuff cheaper than anyone else!

Rack line,
With shipping costs that vendor is at a tad over $60. While still a good deal, it’s not too much different than other vendors. I’d stock up on them.
Still glad I have a 4-6 year supply of them in my spares locker!

Thanks again Brendan for your write up!
Doing your procedure (shortening the offending ECM bolt, removing the two big bracket bolts and a touch of filing) and putting on the Mann 1150/2 fuel filter the first time (back in 2015) took 3 full hours for my Yanmar 4BY2-150. That troublesome bolt was a bear to reinstall.
Today replacing the Mann 1150/2 filter took under 15 minutes! Just remove the easy to access two bracket bolts, use a crescent wrench at its bottom to spin off the old filter, install new filter and reinstall the two bracket bolts. Wish all the maintenance was so easy!