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#1
02-07-2023, 08:14 PM
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Gas tank cleaning…?
I was wondering how one goes about cleaning a gas tank off of an IH Cub Cadet. There is some rust as well as some red tarnish in the bottom. I want to have this thing very clean not only for the engine’s benefit, but also to make sure it safe for me to do the welding I have to do to the bracket.
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IH Cub Cadet 70 project, view my thread in the Kohler engines section for progress. 
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#2
02-08-2023, 06:37 AM
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Try lacquer thinner first. Another fluid to try is acetone. Be careful with both. Wear latex gloves and do not breathe the vapors.
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Ken Old fart - new to Cub Cadets Looking for a nice original low hour 1772 or 1782
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#3
02-08-2023, 07:27 AM
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Quote:
then flash the tank with your lit propane torch,( sticking it in the filler hole after tank dries) the worse it will do if properly cleaned out is nothing, or a slight whoosh maybe if a little residue is left in a tank seam. I've been welding gas tanks for 60+ years, never had one "done blow up" as they say in NASCAR  FWIW some of the newer tanks like on Briggs have an epoxy sealer or resin in the seam of the tank halves. Welding heat will make those seams leak. Also older kohler tanks that have seems soldered or outlet bungs soldered, they can leak requiring re sweating the seam or bung when heated enough from welding. Don't singe yer eyebrows or beard/mustache while flashing 
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#4
02-08-2023, 09:14 AM
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fill and soak for a couple days with vinager. 15 marbles slosh around to loosen things up. drain. wash with hot dawn soap & drain. do your soldering quickly. get some MMO in there or premix cause of flash rust from vinager.
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#5
02-08-2023, 09:38 AM
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clarification of jcubtroy’s response
So fill with vinegar and let soak a couple days. THEN put in 15 marbles and slosh around. And then drain vinegar and marbles. Wash with hot water and dawn dish soap. Why should the water not be too HOT as ol’George mentioned? Weld/solder in timely manner. What is MMO and what does it do? I use apple cider vinegar, NOT plain, correct? thanks for your time
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IH Cub Cadet 70 project, view my thread in the Kohler engines section for progress.
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.
MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.
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