cleaning a gas tank

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jrenn
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cleaning a gas tank

Postby jrenn » Sun Oct 04, 2015 8:08 pm

Got a very dirty and rusty cub gas tank to deal with.Rinsed out pieces of wood,bottle caps,plastic lids and rust .Next step will be to strap it to tractor tire and add a bit of chain.Anyone use oven cleaner and water? How much oven cleaner?and about half full of water and cleaner about right. Working on a yellow sq front short stripe .

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Re: cleaning a gas tank

Postby Barnyard » Sun Oct 04, 2015 9:04 pm

Don't use a chain. If it gets caught in the baffle in the tank you will end up leaving it in there.
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Re: cleaning a gas tank

Postby Rob in NH » Sun Oct 04, 2015 9:18 pm

i use a mix of water and muriatic acid and after its clean rinse with lots of water. come out real clean.
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Re: cleaning a gas tank

Postby Super A » Sun Oct 04, 2015 9:29 pm

Rob in NH wrote:i use a mix of water and muriatic acid and after its clean rinse with lots of water. come out real clean.


This is the way to do it. I made the mistake of putting nuts, bolts, etc. in a tank one time. Never thought I'd get them all out.

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Re: cleaning a gas tank

Postby clintmo » Sun Oct 04, 2015 9:38 pm

I too tried the strap-it-to-a-tire-with-nuts-and-bolts-inside trick and regretted it. Just yesterday I cleaned a tank with muriatic acid and it worked like a jewel.

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Re: cleaning a gas tank

Postby jrenn » Sun Oct 04, 2015 10:18 pm

So how much acid and water? Thought the chain would be easer to get out.I saw a interesting parts cleaner setup one time.A oil drum on a horizontal axel ,tight lid,turning slow with an electic motor with varsol and 1 inch seramic tiles.Said he usualy let it runfor a day .Parts I saw were spotless

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Re: cleaning a gas tank

Postby Super A » Sun Oct 04, 2015 10:51 pm

jrenn wrote:So how much acid and water? Thought the chain would be easer to get out.I saw a interesting parts cleaner setup one time.A oil drum on a horizontal axel ,tight lid,turning slow with an electic motor with varsol and 1 inch seramic tiles.Said he usualy let it runfor a day .Parts I saw were spotless


About a cup of acid per gallon of tank capacity. Let sit for 24 hours, rinse thoroughly, I sloshed some acetone around after I rinsed it to "dry it out."

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Re: cleaning a gas tank

Postby schmibm » Mon Oct 05, 2015 9:49 pm

I usually put in a gallon of muratic and then top it off with water. Then for the next few days keep sloshing and turning the tank to get it all. If its real bad, you may need to replace the acid. After that, drain and flush with water real well. I then put in about a quart of E-85. That sucks up all the water. Once that dries in the sun for a day or two, follow up with US Gas Tank sealer from Por-15. It is the best tank sealer out there. I have used Red-Kote on a few tanks. But I by far prefer the Por-15 tank sealer.
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Re: cleaning a gas tank

Postby jrenn » Tue Oct 06, 2015 9:00 pm

Progress report;Last night I fill the tank with warm water and added 1/2 gal of mutiatic acid .Today I sloshed it around several times and dumped it tonite;then rinsed several times .I can see some rust yet along the edges etc.Tomorrow I'll use the hotsy for a while then repeat the acid I have a can of Northern Tank Liner.Haven't decided to use it or not.Is raising the outlet fitting a good or bad thing?It do'se leeve more gas to go stale

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Re: cleaning a gas tank

Postby schmibm » Tue Oct 06, 2015 9:46 pm

If you got the tank clean and sealed, there is no need to raise the outlet fitting. My opinion is to fix the tank and leave the standpipe alone as this worked well for 50+ years. The tank can just collect that much more bad stuff on the bottom.
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Re: cleaning a gas tank

Postby Cub-Bud » Wed Oct 07, 2015 2:56 pm

I know I am late entering this discussion, but I have used this product twice with excellent results.

http://www.por15.com/POR-15-Motorcycle-Fuel-Tank-Repair-Kit-_p_106.html
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Re: cleaning a gas tank

Postby schmibm » Wed Oct 07, 2015 3:01 pm

Yep, that's the same product I used as stated above. I just purchased the sealer and purchased my own acid locally. Muratic to clean the tank and phosphoric to etch the tank and coat it with phos so it won't rust while its drying.
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Re: cleaning a gas tank

Postby jrenn » Thu Oct 08, 2015 9:10 pm

Checked the tank again today.Still rust along the edges so partly refill it and more acid.This time I stick a long air blow gun and stired it up good a few times.I think this time should finish it

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Re: cleaning a gas tank

Postby Cub-Bud » Fri Oct 16, 2015 8:45 am

I have also used this product.

http://www.kbs-coatings.com/large-cycle-tank-sealer-kit.html

Both worked well, but If I had a choice, I would use the KBS kit.
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Re: cleaning a gas tank

Postby schmibm » Fri Oct 16, 2015 8:59 am

Cub-Bud wrote:I have also used this product.

http://www.kbs-coatings.com/large-cycle-tank-sealer-kit.html

Both worked well, but If I had a choice, I would use the KBS kit.


That kit seems very cost effective. Do know if the sealer drains out of the tank and can be reused?

With the Por-15 product I used, it can be reused over and over. With the RedKote, it drains out very stiff and clumpy and would never be able to be reused. This makes the cost per tank significantly higher.
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