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LAWN BOY 02-07-2023 08:14 PM

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.

farmer52 02-08-2023 06:37 AM

Try lacquer thinner first. Another fluid to try is acetone. Be careful with both. Wear latex gloves and do not breathe the vapors.

ol'George 02-08-2023 07:27 AM

Quote:

Originally Posted by farmer52 (Post 523565)
Try lacquer thinner first. Another fluid to try is acetone. Be careful with both. Wear latex gloves and do not breathe the vapors.

Then wash it out with hot water and yer favorite dish soap, taking care to use HOT water.
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:beerchug:
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 :biggrin2:

jcubtroy 02-08-2023 09:14 AM

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.

LAWN BOY 02-08-2023 09:38 AM

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

RLause 02-08-2023 09:43 AM

MMO, Marvel Mystery Oil

LAWN BOY 02-08-2023 09:52 AM

MMO usage
 
How do I use the MMO in this case? How full to I need to fill the tank with it? How much of it will I need? etc… I’ve never heard of MMO before but it is sounding like a good product from what I hear online.

R Bedell 02-08-2023 11:49 AM

Quote:

THEN put in 15 marbles and slosh around
I would use "hex nuts" ie: 1/4-20. The hex edges, when shaken around, will loosen the scale up.

Let the vinegar soak for 48 hours, then use the hex nuts.

SDBOB 02-08-2023 12:58 PM

I've used stone about the size of your small fingernail (#8). Small handful shake well. Then wash. I have local automotive gas tank repair shop do another. He did a good job unsoldered then resoldered tank.

jcubtroy 02-08-2023 03:10 PM

lawn boy, sorry i take some things for granted. with the white vinager after a couple of days , i,ll scrub the outside the vin. & baking soda. kinda watch putting alot of baking soda in a tank with the vin. you,ll find out. you can rinse the tank then after soldering with kerosine. the oil is too coat the tank.


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