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How often do you change in boat gas fuel filter?

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How often do you change in boat gas fuel filter?

Old 06-05-2019, 06:22 AM
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Default How often do you change in boat gas fuel filter?

Just wondering what the majority of you guys do? Outboard 4 stroke and put about 50 hours a year. I have a Parker 10 micron water separator. I carry a spare if the engine starts to starve for fuel. Do you just empty the water or do you change every year? Am I wasting money by changing every year? Thanks
Old 06-05-2019, 06:25 AM
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I change my Racor two micron filter element whenever needed.

A vacuum gauge tells me the level of restriction within the element. If it gets close to the motor makers limits I would change it based on the restriction. Never have had to do that. Unfortunately, I change the element about once every two/three years because of corrosion.

From time to time I get a couple of tablespoons full of water in the bowl. I just drain that out.
Old 06-05-2019, 06:27 AM
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It's $10, I change it every year.
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Old 06-05-2019, 06:32 AM
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I change mine every year as well.
Old 06-05-2019, 06:36 AM
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I change every year, sometimes more often. I hope it will live longer so
Old 06-05-2019, 07:38 AM
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Originally Posted by davescarp View Post
It's $10, I change it every year.
Not a $10 spin on aftermarket filter. Mine is a Parker or Marpac. Cheapest I can find is about $30 on Amazon and most places are around $50.

As far as a gauge....I don't have a gauge. I don't believe most smaller CC's do. As I said...I carry a spare and can simply swap it out if my engine starts to starve. I guess I am looking for someone to give me logic that would convince me if I let it slide to maybe every other year....no harm to the fuel system would be done. Yeah....I'm a tight bastard.
Old 06-05-2019, 07:41 AM
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Change mine every year and would still do so if I used a $30-$50 filter. With the overall expense involved in boating I’m not going to cheap out on something that should be yearly maintenance over 50 bucks.
Old 06-05-2019, 07:43 AM
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First I'm thrifty my wife calls me cheap.
1) There are ton's of things to cut corners on but a $30 filter is about the last place to do it. I change mine once a year no matter what.
2) If you want to be cheap depending on hours take the filter off dump it out in a clear container if it has little to no crap in it with zero water I would say you don't have to change it even once a year.
Old 06-05-2019, 07:49 AM
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I use only non-ethanol gas, my fuel system is closed (only vents when the cap is open), and my boat is garage kept. I change every other year. If your boat is exposed to humidity being stored outside and the fuel system can get air, change it annually.
Old 06-05-2019, 07:51 AM
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Originally Posted by homeby51 View Post
Just wondering what the majority of you guys do? Outboard 4 stroke and put about 50 hours a year. I have a Parker 10 micron water separator. I carry a spare if the engine starts to starve for fuel. Do you just empty the water or do you change every year? Am I wasting money by changing every year? Thanks
1) when necessary
2) when manual recommends

that typically means each spring at commissioning

i check monthly, drain water

need to upgrade my racors to clear bowl

racor filters for my larger racors are only $13-15

i switched from 30 micron racor to 10 micron, allows the engine-mounted filter to last longer as less stuff gets to it

carry spares! filters are probably the cheapest part of boating!
Old 06-05-2019, 07:52 AM
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I change mine every year. My boat has the big blue Yamaha filter.
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Old 06-05-2019, 08:08 AM
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Are you talking about the on engine fuel filter or an external in line fuel filter?

As for us we change the in line one every year. We inspect the on engine one 3-4 times a year. Have not changed that one yet. Also the yami mechanic has looked a it and said it is fine.

We have the inline fuel filter so catch stuff before it gets to the engine.
Old 06-05-2019, 08:08 AM
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Annually, cheap insurance.
Old 06-05-2019, 08:14 AM
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Every 100 hours on mine which is every 6 months typically. I used to change the ones on the engine every 200 but the mechanic I am using now does them every time. If there is a place to save money this is not it in my opinion. I haven't had a fuel related issue on any of my boats in more than 10 years using ethanol. One of my boats is used at least monthly but has a 58 gallon gas tank and averages 5-6 mpg so that fuel doesn't get turned over very quickly.
Old 06-05-2019, 08:21 AM
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My boat has two Yamaha "big blue" 10 micron filters. One for each fuel tank and the engine it supplies fuel for. I change them every time I do the 100 hour service but what I don't do is change the cardboard pleated filter located on the from of the motor very often at all. That secondary filter has a little red ring in it that will float if water gets into that filter and I always check that red ring. My thinking is that if the Yamaha 10 micron filters do a good job of ensuring that clean fuel gets to the motors there is no need to change the smaller filter on a regular basis.
Old 06-05-2019, 10:53 AM
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Thanks.
Let me ask this. Do you guys like the cheaper spin on fuel filter (without the water catch bowl and looks like an oil filter) or do you like the element that has the sight glass bowl screwed into the bottom to inspect for water. The reason I ask is that one is about $10 and one is about $30. Any pros and cons regarding the type? Thanks
Old 06-05-2019, 11:23 AM
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I personally like the Racor system w/ a clear bowl. Much easier to visually inspect. I don't replace my filter until I see a hint of water in the bowl. The filters are ~ $30. Speaking of, I have an unused 10 micron blue Yamaha filter that I'll mail free to the first person that claims it.

I have used Racor components in filtering gases and liquids or gas generation systems for gas and liquid chromatography coupled with mass spectrometer systems north of $400K each. They make quality stuff.

https://www.simyamaha.com/S3213B_RAC...L_p/b32013.htm
Old 06-05-2019, 11:25 AM
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Just changed mine after a year. One was rusted all the way through and weeping gas!
Old 06-05-2019, 12:29 PM
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Originally Posted by stimpson.j.cat View Post
I personally like the Racor system w/ a clear bowl. Much easier to visually inspect. I don't replace my filter until I see a hint of water in the bowl. The filters are ~ $30. Speaking of, I have an unused 10 micron blue Yamaha filter that I'll mail free to the first person that claims it.

I have used Racor components in filtering gases and liquids or gas generation systems for gas and liquid chromatography coupled with mass spectrometer systems north of $400K each. They make quality stuff.

https://www.simyamaha.com/S3213B_RAC...L_p/b32013.htm

I'd take that filter if you are serious.
Old 06-05-2019, 12:32 PM
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Once or twice per year depending on hours

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