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Been trying to clean out cub gas tank.

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old
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PostPosted: Sat May 08, 2021 11:35 am    Post subject: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

So this tank is bad. When I got this cub it was about half full of bad smelling gas. I drained that out and have tried a number of things to clean the tank up. I've used vinegar, Matratic acid, water from my garden hose and yet after all that if I pour in say a half gal. of gas and let it sit over night then drain it out into a Dr. Pepper bottle it looks like the bottle has Dr. pepper in it instead of gas. I wonder what would happen if I tried to run it on this tank and if after tiem it would clean up. Almost like it has some tar in the tank.
 
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Charlie M
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PostPosted: Sat May 08, 2021 12:26 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

Couple of years ago I bought a Super C that had sat for ever and the tank had gas left in it and turned into a tar like substance. I couldn't even turn the valve on the sediment bowl. My first thought was to buy another tank but didn't find one. I got it out with acetone. Took about 4 gallons but it did clean out. I plugged the outlet and put in the acetone and left the tank in various positions to get all the surface area affected.
 
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leroy in ne
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PostPosted: Sat May 08, 2021 12:37 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

Some have good luck with E 85 to dissolve old gas. Myself I don't know. Good luck Rich.
 
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old
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PostPosted: Sat May 08, 2021 1:04 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

Don't know of any place in my area that has E85
 
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rustred
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PostPosted: Sat May 08, 2021 2:58 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

it has to be steam cleaned.
 
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thdrduck
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PostPosted: Sat May 08, 2021 3:39 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

I am at the moment working on just such an issue. So far a can of carb choke cleaner left to soak overnight and then 6 or so links of chain dropped into the tank to help scour it. Got a bunch of crap out but more to go. Next is denatured alcohol (sort of e85) let soak and agitate again. I usually use 1/4 inch nuts but this tank has a lip at the filler so would be hard to get the nuts out so used chain instead and like the results so far. Know about the risk of sparking and blowing myself up but not really much of a risk, just rock back and forth do not shake.
 
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Mark-Ia
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PostPosted: Sat May 08, 2021 3:58 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

Acetone should melt that varnish.
 
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MARK ROBKE
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PostPosted: Sat May 08, 2021 4:00 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

Would a can of Seafoam, the kind you pour, work? I really believe steam cleaning would be best, though. Mark.
 
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old
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PostPosted: Sat May 08, 2021 4:03 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

Haven't found any place to steam clean such a thing within 100 mile of me
 
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rockcreek4630
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PostPosted: Sat May 08, 2021 5:17 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

Mek works best you can get it at the hardware store if not as others said acetone.
 
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rustred
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PostPosted: Sat May 08, 2021 5:57 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

well i know for a fact there is not much that will touch that old gas. i have been there a few times already. it has to be steamed or boiled out. all these pour in things are a waste of money. i bought a 1965 grain truck last year that was not run since 1996. removed the tank from behind the seat and the tank was 1/4 full of the same brown stinky stuff , and i used a hotsy steamer on it for a couple hrs and was impressed at the good job it done. its the heat you need with pressure. a pressure washer will kind of work with hot water but probably be good enough to use it.
 
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grandpa Love
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PostPosted: Sun May 09, 2021 3:44 am    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

Hey Old, when you drain the gas and it's a nasty color, does it still smell like gas? If so that cub will burn it.. just make sure your sediment bowl is in good working condition. That cub I got from the barn fire had burnt ,tar like gas in the tank. Never did get it all out. Been running it for several months. Gas is a horrible color in sediment bowl, but tractor is humming right along.....
 
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MoMac
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PostPosted: Sun May 09, 2021 6:36 am    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

Used to be you could find a radiator shop that would hot tank gas tanks. Mike
 
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old
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PostPosted: Sun May 09, 2021 10:25 am    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

I have a new sediment bowl assembly with a stand up screen which I will use. I may replace the short bowl with a tall bowl if I have one in the parts fridge
 
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Charlie M
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PostPosted: Sun May 09, 2021 1:29 pm    Post subject: Re: Been trying to clean out cub gas tank. Reply to specific post Reply with quote

They are getting few and far between around here.
 
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