Warning! New filter system on new Yanmar engines is Bad! - Page 4 - SailNet Community
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post #31 of 51 Old 08-18-2019
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Re: Warning! New filter system on new Yanmar engines is Bad!

We get yelled at if we take too long at the fuel dock. Try to run a tank down to 20% full before filling it. Figure that way mixing less old fuel with new and it gets new biobor right away. Try to wait until at least two tanks are low but sometimes until all are low if I know I can get a lower price in the near future (I.e. full up just after clearing out down the road at the next landfall). So may put in 100 to 150 gallons at a time. Just under 200 if really empty. At 2g/m thatís longer than any fuel dock will put up with so definitely see the logic of no prefiltering.
Every trawler Iíve been on has a for real polishing system and a day tank. You could have dead bodies floating in the fuel tank(s) and the engine would be fine. Has anyone here done something similar on their boat?
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post #32 of 51 Old 08-18-2019
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Re: Warning! New filter system on new Yanmar engines is Bad!

Im fairly religous about keeping my small tank and 4 jugs topped up.
I do not add any biocide or treatments to the tanks.
The last place i want any trash going...is to the bottom of the tank.
Filter now in use is almost 2 years in....est around 475 hrs. Engine hrs = oil changes
Bowl is clear with a few specs of whatever fuel trash was put into the fuel jugs.
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post #33 of 51 Old 08-18-2019 Thread Starter
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Re: Warning! New filter system on new Yanmar engines is Bad!

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Originally Posted by olson34 View Post
Pictured in my blog entry and among the photos is also one showing the old installation of the smaller Racor inside the engine compartment.

Very nicely done!


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post #34 of 51 Old 08-18-2019
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Re: Warning! New filter system on new Yanmar engines is Bad!

These Racor filters seem all the rage now ! I have always used CAV filter blocks for the past 30 years with great results ! And a lot cheaper
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Re: Warning! New filter system on new Yanmar engines is Bad!

Its the racor filter hardware thats super $s.
Generic replacement filters are inexpensive.
The 500 is very user friendly....and proven.

Im sure there are others that perform as well and are much less $s.
Post a link to the one you like
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post #36 of 51 Old 08-18-2019
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Re: Warning! New filter system on new Yanmar engines is Bad!

Just a random thought, there might be another way to skin this cat. If you have multiple tanks, or something more on for an additional small tank, make one tank a ďdayĒ tank.

The engine only ever draws off the Day tank. All other tanks transfer fuel into the Day tank through a filter. That way all fuel is filtered into the day tank, and then filtered to the engine. If you keep an eye in the Day tank filter you should be able to change it out before failure while running the engine.

This is the way I have my boats set up. It cost some replumbing and a fuel transfer pump, and spare. I run the transfer pump off a timer so I donít over fill, but could be tied to an auto float switch cut off.

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Re: Warning! New filter system on new Yanmar engines is Bad!

Drift....

3rd hand story

A cap/trawler in a florida marina transfered 2x the diesel into a 2nd tank of what it would hold...out the vent.
Alphabet agencies involved... many $$$s
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post #38 of 51 Old 08-18-2019
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Re: Warning! New filter system on new Yanmar engines is Bad!

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Originally Posted by hpeer View Post
Iíve been TOLD, by a surveyor, that the damn metal cups are an ABCY requirement.
ABYC requires fuel filters to meet a fire rating specification or be fitted with a heat shield. I don't know of any plastic bowls that will meet the requirement although glass bowls do.
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post #39 of 51 Old 08-19-2019
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Re: Warning! New filter system on new Yanmar engines is Bad!

A super simple band-aid would be to drill out those tiny holes.

I would do that until I had money saved up for a dual Racor setup.
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post #40 of 51 Old 08-19-2019
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Re: Warning! New filter system on new Yanmar engines is Bad!

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Originally Posted by outbound View Post
.....Every trawler Iíve been on has a for real polishing system and a day tank. You could have dead bodies floating in the fuel tank(s) and the engine would be fine. Has anyone here done something similar on their boat?
Good point. No way one is prefiltering at 2gal/min, when taking on 1000+ gallons. Not humanly possible.

Best I can tell, polishing systems are nothing more than a couple of filters in series that recirculate the fuel. Probably a 10 mic and 2 mic in series, with water separating filters.

They would be a great idea, if one has the space, power and money. 2 Racors, a pump and all the supplies and fittings is probably running north of a boat buck, before all is done. I wonder if one could rig a dual R500 system to do double duty. If each filter went to/from a mainfold, some valving might do the job. Motor away from the dock, drop the hook, turn some valves and power up the polisher, while one cracks a cold one or makes a meal. Interesting thought.
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