Old crystialized gas

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nytebyte
Posts: 98
Joined: 18 Jan 2016, 11:23
Location: ND

Old crystialized gas

Post by nytebyte » 12 Apr 2019, 16:42

Old crusty gas in the bottom of a steel OMC tank. Anyone know of a good way to clean it out. Its gummy and kind of soft. Tried to leave a mix of fresh gas and oil mix in it over the winter and that seemed to soften it a bit but still stuck in a lot of it. Tank is in good shape other than that as in no rust inside or out. Is there something that would dissolve it? Thinking a can of Sea Foam or maybe some of that stuff used to soak carb in?

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KMixson
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Joined: 25 Apr 2008, 16:54
Location: North Charleston S.C.

Old crystialized gas

Post by KMixson » 12 Apr 2019, 18:37

Place some pea gravel in it and shake vigorously. That will break up the deposits in it.

Weldorthemagnificent
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Joined: 12 Mar 2017, 12:09

Re: Old crystialized gas

Post by Weldorthemagnificent » 12 Apr 2019, 19:05

I have had some luck with vinegar and water. Dump a jug of vinegar in and shake around or turn the tank periodically. Fill rest with water and let it sit. Take it to a carwash one town over at night and blast the heck out of it. Lol. Lacquer thinner eats the stuff good but will also take the paint off the outside. Last one I did was vinegar and carwash, then I put an inline fuel filter right off the tank.

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lckstckn2smknbrls
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Location: Algonquin Il

Old crystialized gas

Post by lckstckn2smknbrls » 12 Apr 2019, 19:07

KMixson wrote:Place some pea gravel in it and shake vigorously. That will break up the deposits in it.
I like a handful of 1/4" nuts.
1971 14' Ward's Sea King Jon Boat / 1983 Mariner 25HP

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DaleH
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Old crystialized gas

Post by DaleH » 12 Apr 2019, 19:09

Acetone to clean out a tank, gravel too sounds good! ADD a Racor fuel-water separator for good measure, cheap insurance!
#1) 1st tin rebuild, 18' Lund http://forum.tinboats.net/viewtopic.php?f=21&t=36583
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#3) 16' V-tin rebuild http://forum.tinboats.net/viewtopic.php?f=21&t=36465
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jethro
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Old crystialized gas

Post by jethro » 15 Apr 2019, 14:27

lckstckn2smknbrls wrote:
KMixson wrote:Place some pea gravel in it and shake vigorously. That will break up the deposits in it.
I like a handful of 1/4" nuts.
That what I have done before with a motorcycle tank. Worked great.
I fish, therefore, I am.

1993 Starcraft SF 14 DLX side console with 25 hp Mercury 2 stroke
2003 Sylvan 2100 Profish walkthrough with 150 Mercury Saltwater and 6hp Mecury 4 stroke kicker

nytebyte
Posts: 98
Joined: 18 Jan 2016, 11:23
Location: ND

Old crystialized gas

Post by nytebyte » 15 Apr 2019, 18:28

Thanks for the ideas! Ended up using the pressure washer. Took the fuelcap off one end of the old metal tank and gauge off other end and it worked great.

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