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Salt water in gas #4579511
11/19/17 10:11 PM
11/19/17 10:11 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Online content OP
motor_oil_madman  Online Content OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I got my boat running that sank, so I pumped out the gas. I have about 20 gallons of it. Can I filter out the water and put it back in? I'm a little worried about it being salt water.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Salt water in gas [Re: motor_oil_madman] #4579517
11/19/17 10:15 PM
11/19/17 10:15 PM
Joined: Mar 2012
Posts: 1,277
San Antonio, TX
E150GT Offline
E150GT  Offline
Joined: Mar 2012
Posts: 1,277
San Antonio, TX
There’s funnels that filter out water in gas. Works pretty wel.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 57k 10w30
2006 Buick Lucerne CXL 3.8 31k 5w30
Re: Salt water in gas [Re: motor_oil_madman] #4579518
11/19/17 10:15 PM
11/19/17 10:15 PM
Joined: Sep 2010
Posts: 6,987
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 6,987
Texas
Some fire departments will take bad gas and use in training fires …

I would not try to use it myself …

Re: Salt water in gas [Re: motor_oil_madman] #4579570
11/19/17 10:57 PM
11/19/17 10:57 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Go buy a Mr. Funnel from O'Reilly auto parts.

Re: Salt water in gas [Re: motor_oil_madman] #4579646
11/20/17 12:52 AM
11/20/17 12:52 AM
Joined: Feb 2012
Posts: 30
Long Beach CA
lbhsbz Offline
lbhsbz  Offline
Joined: Feb 2012
Posts: 30
Long Beach CA
What type of gas? If non-ethanol, yes. Let it separate out, pull the gas off the top and pour it back in the tank.

If you were using fuel that contained ethanol...it's different. Ethanol mixes with water much better than it mixes with gasoline, and any water in the fuel will draw the ethanol out of solution with the gasoline, so what separates out is only gasoline, but of a considerably lower octane grade now that it's lost it's ethanol. If you run the boat on 87, I might add 5 gallons of your recovered fuel to 20 gallons of fresh 91 out of the pump, but aside from that, I'd use it to kill weeds.

Re: Salt water in gas [Re: motor_oil_madman] #4579659
11/20/17 02:16 AM
11/20/17 02:16 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
They come in different sizes. Gasoline and water goes in -- Gasoline comes out.


Re: Salt water in gas [Re: Merkava_4] #4579684
11/20/17 04:48 AM
11/20/17 04:48 AM
Joined: Sep 2010
Posts: 6,987
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 6,987
Texas
I use one of these to fill my skiff ~ what is considered the “sump” to catch heavier “free water” is quite small. I think it’s great as a precaution ~ but not sure how well it will work a high percentage of water in 20 gallons …

Salt water belongs under the boat ~ not in a tiny sensitive fuel system on the motor …

Do you have a Racor filter ahead of engine fuel filter …

Re: Salt water in gas [Re: motor_oil_madman] #4579693
11/20/17 05:33 AM
11/20/17 05:33 AM
Joined: Feb 2014
Posts: 593
Margate England
Claud Offline
Claud  Offline
Joined: Feb 2014
Posts: 593
Margate England
How much does 20 gallons cost?. Is it worth risking your engine for?.

Claud.

Re: Salt water in gas [Re: motor_oil_madman] #4579765
11/20/17 07:41 AM
11/20/17 07:41 AM
Joined: Jun 2015
Posts: 4,225
New England
Virtus_Probi Offline
Virtus_Probi  Offline
Joined: Jun 2015
Posts: 4,225
New England
I'm not sure how dissolved salt could be filtered easily...I'd definitely be concerned about that crystallizing out in the combustion chamber.
Isn't that why people put sugar in the gas tanks of their enemies?
Might be some chemical approach that could work to get that stuff out, but aren't we talking about less than $100 worth of product unless this is some special marine gas?


2014 Forester XT, 86000 miles
Last Change;
M1 5W30 d1G2
Tokyo Roki 15208AA170 filter
Re: Salt water in gas [Re: Claud] #4579798
11/20/17 08:27 AM
11/20/17 08:27 AM
Joined: May 2013
Posts: 676
Florida
SilverSnake Online content
SilverSnake  Online Content
Joined: May 2013
Posts: 676
Florida
Originally Posted By: Claud
How much does 20 gallons cost?. Is it worth risking your engine for?. Claud.


Good thinking. Can't believe anyone would even consider putting the fuel back in.


2016 Charger, 6.4L-485 HP (PUP 0W-40)
2017 BMW 330i, 2L-248 HP (BMW 0W-20)
2018 Jeep GC, 5.7L-360 HP (PP 5W-20)
2008 20KW Generac (Amsoil 10W-30/30)
Re: Salt water in gas [Re: motor_oil_madman] #4579813
11/20/17 08:48 AM
11/20/17 08:48 AM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
Lets see...20 gallons at $2.50/gal is $50.

So, as long as you boat engine is only worth $50 then why not? Oh wait, the funnel is another $10 so as long as your engine is only worth $40.

Seriously though, I would not even dream of doing this and I have RACORS.

And as was mentioned above...saltwater behaves differently than fresh water in filters.



Multiple Diesel and Gasoline vehicles
Re: Salt water in gas [Re: motor_oil_madman] #4579839
11/20/17 09:32 AM
11/20/17 09:32 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Online content OP
motor_oil_madman  Online Content OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I forgot salt water has more buoyancy or whatever.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Salt water in gas [Re: Claud] #4579972
11/20/17 12:00 PM
11/20/17 12:00 PM
Joined: Jan 2013
Posts: 1,841
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 1,841
Texas
Originally Posted By: Claud
How much does 20 gallons cost?. Is it worth risking your engine for?.

Claud.


Pretty much what I was thinking .


Wyr
God bless
Re: Salt water in gas [Re: motor_oil_madman] #4580092
11/20/17 02:16 PM
11/20/17 02:16 PM
Joined: Jan 2009
Posts: 6,171
New England
gathermewool Online content
gathermewool  Online Content
Joined: Jan 2009
Posts: 6,171
New England
How many gallons of fuel was in there before it sank vs after?

I wouldn't even consider using that fuel. Water and fuel will separate, that's true, but your remaining fuel will have high chloride, which will cause additional corrosion and other unforeseen issues, such as plating out in high temp areas.

Originally Posted By: motor_oil_madman
I forgot salt water has more buoyancy or whatever.


Salt water is heavier. That's why people float higher when swimming in the dead sea - high salinity.


'14 Forester XT (Cobb Stage 1)
Edge 0W-40 + FU filter
'15 Legacy 2.5i (OEM Stage -7)
Edge 0W-20 + FU filter
Re: Salt water in gas [Re: Claud] #4580126
11/20/17 02:59 PM
11/20/17 02:59 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: Claud
How much does 20 gallons cost?


20 x $2.899 = $57.98

Mr. Funnel AF3CB from Amazon = $22.98

https://www.amazon.com/Mr-Funnel-AF3CB-Fuel-Filter/dp/B000SOIRCG

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