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Rust in LP fuel tank

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Kelvin

06-05-2005 12:35:45

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Got a Moline ZA that was LP. previous owner converted it to gasoline using the lp tank for fuel.
When I got it had lots of water in the tank. Now that its running I'm getting great gobs of tiny rust flakes in the outlet valve, fuel filter and carb. How should I go about cleaning the tank? Is it hopeless?
Thanks!
Kelvin

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Eric Stevens

06-12-2005 10:21:07

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Re: Rust in LP fuel tank in reply to Kelvin, 06-05-2005 12:35:45

I used to work cleaning boilers and industrial equipment (doesn't make me a pro) and this is what I would do. Go to the local hardware store and buy a small container of TSP trisodium phosphate and a bottle of meratic acid. Take about 1 cup of tsp and some VERY hot water to fill the tank. Leave it sit for an hour but stir it often dump this into a pail for later. Rinse 2X with hot water. Now while tank is hot use 120 deg. or slightly cooler water with about 8-16 ounces of meratic acid. Let this soak a couple hours stirring often and keep it warm. Try not to stir so hard that you get a lot of air in the solution. Now dump this out on some lime stone or into sewer drain (city not septic system) followed with the water mixed with TSP (will just help to neutralize it). Rinse your tank with hot water about 5 or 6 times completely full, then blow it dry fast to keep surface rust from forming. When all of the water is out I would mist it with wd40 to protect it until you get fuel back into it. The tsp will remove the organic oil and gas getting you to the metal. The acid of course will get rid of your iron scale. Be sure to use rubber gloves and don't let either contents get on any alluminum, it will eat it up. Eric

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Flyrod

06-05-2005 17:28:10

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Re: Rust in LP fuel tank in reply to Kelvin, 06-05-2005 12:35:45

I would take some broken glass from a side glass of a car or truck.Put the pieces in the tank and if you have some way to rotate it constantly for lets say 36hrs.You will find out this way works really well.Also i would use "kreem"fuel tank sealant to line the tank to prevent any further rusting.E-mail me if you have any questions.

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