Only Cub Cadets - Gas tank cleaning…?

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Quote:

Originally Posted by BKsCC (Post 523610)

There's this stuff called Evap-O-Rust that's about $25-$30 for a gallon at tractor supply. It's really good stuff and works better and faster than vinegar, and won't accidentally discolor metal red from sitting too long (It'll darken metal though if it sits for over 24 hours). I just used it to do my tank. It's reusable for several uses so don't just dump it away when you're done. Run it through some cheesecloth to catch the chunks of rust and then re-bottle it.

I have also used this with great success. I have been using the same gallon container of Evap-O-Rust for over 10 years now. If there's flaky rust in the tank I let it sit for a day or so, turning it every few hours to make sure all surfaces get soaked. If it's not bad it may only take an hour or so. Make sure to fill it back with gas fairly quickly because once it's cleaned to bare metal it will flash rust pretty quickly if you let it sit empty.

Where can I buy the MMO?

Quote:

Where can I buy the MMO?

Anywhere. Big Box stores, Auto Parts store, Farm/Ag Stores, Hardware stores, even Wal-Mart.

Response to R Bedell

Oh, okay. I’ve never noticed it before in stores. Thanks for letting me know. I’ll look next time I’m in town.

32oz bottle at Wally World - $7.48 (1 gallon $21.97). Both are in stock at my local store.

I’m just making sure because I’ve never done this before.
Evapo-Rust will not cause flash rust, correct? I know vinegar would.
The DAWN and warm water will not cause flash rust so long as I get the MMO in there after rinsing thoroughly, correct?

Flash rusting is not caused by vinegar nor Evapo-Rust.
It is caused by humidity (moisture) in the air attacking the newly cleansed ferrous metal of the tank.

MMO to prevent flashing was a suggestion, not a requirement.
Any thin, mild lubricant that you can fully coat the inside of the tank with will suffice,
Something such as transmission fluid or light oil reduced with kerosene.
Then just rinse the tank out with gasolene before using.