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fuel tank 9n

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RP-40-9n

08-28-2006 18:29:37




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just pulled fuel tank to see why fuel keeps shuttin off. 40-9n it is full of dirt-grit and chunks of rust. question? i read that you can clean them out and seal them with something, anybody know what that something is? help-help RP




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Paul Malizia

08-28-2006 21:26:50




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 Re: fuel tank 9n in reply to RP-40-9n, 08-28-2006 18:29:37  
Sorry about the "test". Forgot my password.
I went through the stones/shake/empty method a few years ago and my fuel bowl would fill every three months or so.
This year when I had it apart to fix the steering, I started with the electrolysis method. First degease the tank with a strong detergent. Put about a cup of Arm and Hammer Super Washing Soda into the tank and fill it with water. Make an electrode that can be suspended into the tank without touching the sides (weld two pieces of steel into a "t" shape, and insulate the top part with electrical tape). Connect your positive battery charger clamp to the electrode and negative to the tank. The rust will migrate to the positive electrode, and you'll have to keep cleaning it off and wiping the scum off the top.
After a few days, the charger will stop drawing current no matter what you do, so rinse it out and put the first of three things you can buy from J.C. Whitney called "KREEM" into the tank ($39.00), which is phosphoric acid. You can also use muriatic, but don't stop here or the tank will "flash rust" and look worse than before. Trust me. Then add the second step from the kit, which is methyl ethyl ketone. Nasty smelling stuff. Apparently absorbs or dries the water. Next, put in the epoxy paint, roll it around and let it dry. Just don't forget to put a wire into the two vent holes in the tank. You can see the one but not the other. Look in your owner's manual to see.
I can point a flashlight into the bottom of a full tank of gas and see the white (color of the KREEM) bottom of my restored gas tank.
I confess, although perhaps blasphemous, that if there was such a thing as a plastic gas tank for my '49 fm 8N I would have bought it.

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Paul Malizia

08-28-2006 21:03:03




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 Re: fuel tank 9n in reply to RP-40-9n, 08-28-2006 18:29:37  
Sorry about the "test". Forgot my password.
I went through the stones/shake/empty method a few years ago and my fuel bowl would fill every three months or so.
This year when I had it apart to fix the steering, I started with the electrolysis method. First degease the tank with a strong detergent. Put about a cup of Arm and Hammer Super Washing Soda into the tank and fill it with water. Make an electrode that can be suspended into the tank without touching the sides (weld two pieces of steel into a "t" shape, and insulate the top part with electrical tape). Connect your positive battery charger clamp to the electrode and negative to the tank. The rust will migrate to the positive electrode, and you'll have to keep cleaning it off and wiping the scum off the top.
After a few days, the charger will stop drawing current no matter what you do, so rinse it out and put the first of three things you can buy from J.C. Whitney called "KREEM" into the tank ($39.00), which is phosphoric acid. You can also use muriatic, but don't stop here or the tank will "flash rust" and look worse than before. Trust me. Then add the second step from the kit, which is methyl ethyl ketone. Nasty smelling stuff. Apparently absorbs or dries the water. Next, put in the epoxy paint, roll it around and let it dry. Just don't forget to put a wire into the two vent holes in the tank. You can see the one but not the other. Look in your owner's manual to see.
I can point a flashlight into the bottom of a full tank of gas and see the white (color of the KREEM) bottom of my restored gas tank.
I confess, although perhaps blasphemous, that if there was such a thing as a plastic gas tank for my '49 fm 8N I would have bought it.

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dan hill

08-29-2006 05:13:30




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 Re: fuel tank 9n in reply to Paul Malizia, 08-28-2006 21:03:03  
MEK is bad stuff, dont use it..Most tank coating will fail when ethanol gas mix is used.40 states are using the gas mix now.



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Paul Malizia

08-28-2006 20:37:30




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 Re: fuel tank 9n in reply to RP-40-9n, 08-28-2006 18:29:37  
Test



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dafooge

08-28-2006 19:28:07




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 Re: fuel tank 9n in reply to RP-40-9n, 08-28-2006 18:29:37  
i had the same problem,,,had this gunk like rust and snot filling my bowl, i took the tank off put about 200 nuts in the tank shook the hell out of it to loosen the rust,when to the carwash degreese it and done,,,it worked like a champ.gl with yours,,,



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Sorehead

08-28-2006 19:12:42




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 Re: fuel tank 9n in reply to RP-40-9n, 08-28-2006 18:29:37  
I finally got tired of fighting mine and bought a new one. Much better.



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Sean (TX)

08-28-2006 18:43:23




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 Re: fuel tank 9n in reply to RP-40-9n, 08-28-2006 18:29:37  
I have good things about POR-15 but at 62 bucks you can add another 60 and get a new one and save yourself some trouble. Might be some less spendy products out there. Maybe someone else will chime in.

Mine is pretty dirty to. Need to do something to. Cant see alot of rust but there could be some.

Sean (TX)

'41 9N79052

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RP-40-9N

08-28-2006 19:12:42




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 Re: fuel tank 9n in reply to Sean (TX), 08-28-2006 18:43:23  
THANKS SEAN- YEA SOUNDS A LITTLE PRICEY-MIGHT JUST TAKE IT TO CAR WASH AND USE THE DEGREASER, BLOW IT OUT GOOD, PUT A NEW FILTER AND SEDIMENT AND SEE WHAT HAPPENS. THANKS AGAIN rp



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