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Fuel tank

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1975

04-16-2008 17:28:10

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my young cousin power washed the inside of my fuel tank to get the dirt and sediment out and now there is rust in it. Is there any way of getting it all cleaned out?

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Skyhawk Greg

04-17-2008 21:39:45

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Re: Fuel tank in reply to 1975, 04-16-2008 17:28:10

Home Depot has a reasonably priced Behr's product that is used to etch concrete. It has phosphoric acid in it, and it works pretty well.

Greg

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F-I-T

04-18-2008 05:17:40

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Re: Fuel tank in reply to Skyhawk Greg, 04-17-2008 21:39:45

HD also carries Phos-pho-Ric, in the paint prep section, which is only H3PO4, no filler. Best value that I have found. Some Lowe's carry Jasco "Prep & Primer for rusty metal". It works well, too, but I have only found it in quarts.

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F-I-T

04-17-2008 07:53:55

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Re: Fuel tank in reply to 1975, 04-16-2008 17:28:10

I also would use Phosphoric Acid swished with a handful of large nuts to break any rust flakes loose faster. Even if he blasted the inside, I bet there are deposits on the upper surface that he did not get. Rotate the tank on a BBQ spit if you can, or strap it to a rear tractor wheel jacked up and let that rotate for a while to toss the nuts atound the inside in a random tumble.

Once the phosphoric acid has done its job in converting any red rust into black oxide, that is, the finish is whitish and dry, and may even have some flaking, toss in a handful of dry nuts and rattle those around to burnish the surface smooth leaving a bit of protective phosphate coating, then rinse it with some diesel until the fuel comes out flakeless and clean. It will look like new inside.

I don"t like to coat except as a last resort as there are too many sad stories of coating/liners that deteriorated down the road and spewed debris into every carburetor passage.

HTH

Frank

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PBrowning

04-17-2008 08:35:36

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Re: Fuel tank in reply to F-I-T, 04-17-2008 07:53:55

Frank -- another "tumbling tip" comes from DaveR in Oregon -- he used a cement mixer!! Now that one seems pretty neat -- if you have one handy. (PatB)

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Dave H

04-16-2008 17:41:24

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Re: Fuel tank in reply to 1975, 04-16-2008 17:28:10

depending on how deeply rusted it is. If light surfae rust, I would just treat it with Phosphoric acid (ospho) and move on.

However you will have to do what makes you feel comfortabel because a lot of folks will follow my post with "take it to a pro and have it sealed"

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Big Country - IL

04-16-2008 17:49:38

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Re: Fuel tank in reply to Dave H, 04-16-2008 17:41:24

I'll echo Dave H - swish some phosphoric acid in it...I used electrolysis (difference = more than just surface rust on my tank) on one of my tanks, pressure washed, swished phosphoric, let dry and finally coated the inside of the tank with 2-cycle oil diluted in a little gas...

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