cleaning the inside of a fuel tank

[Guest]

Hi all,
Last year as part of my 83 GS 750 ES restoration I did a fuel tank treatment. I bought it at a yamaha dealer, it was a 3 step kit that cleans the rust and coats the inside of the tank. It it was fine for a while but I started to see the coating flaking off, and when I removed the tank to drain it at end of the season the fuel was filled with flakes of the coating. it obviously didnt stick the way it was supposed to. I want to redo it with "Red Koat" and I'm wondering how I can remove the rest of the coating.any suggestions?

[tkent02]

Have fun with that.

Next time use POR15.

[azr]

Ya that's going to be a bugger. There's lots of threads on here about it, just use the search function. Haven't read much about "red koat", I'd make sure it's dependable stuff before you use it, again lots of threads on here about what is good tank liner and what is not.

[Nessism]

MEK or acetone to remove old liner

Phosphoric acid to remove the rust

Tons of threads in the archives detailing what to do. The devils in the details.

[BassCliff]

Greetings and Salutations!!

Hi Mr. bdogginit,

Sorry I'm late with your S.W.A.G. In the links below you will find all kinds of information that will help you clean your carbs, change your oil, de-rust your tank, how to post pictures, and all kinds of fun stuff. Welcome to the forum.



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Thank you for your indulgence,

BassCliff

[47mouth]

Basscliff
I to de-rusted my tank using evaporust like you did but after I rinsed it out with hot water and placed the petcock and fuel sensor back within about 10 minutes, I noticed it had already started to flash rust, not horribly but enough to cause concern. What did you rinse yours with? Was I not suppose to use water?
I also made the mistake of not getting a new petcock repair kit and had a slow leak from the fuel outlet.

[quexpress]

Videos prepared by D-Ray about cleaning and relining a rusty tank:

http://www.youtube.com/watch?v=NzYVbCFUu3M&list=UUuyFjuKFgK-9JJrJ1SN-LFw&index=13&feature=plcp

http://www.youtube.com/watch?v=xphC3oy1mwA

http://www.youtube.com/watch?v=hda12k__UWg

[BassCliff]

Hi,

I to de-rusted my tank using evaporust like you did but after I rinsed it out with hot water and placed the petcock and fuel sensor back within about 10 minutes, I noticed it had already started to flash rust, not horribly but enough to cause concern. What did you rinse yours with? Was I not suppose to use water?

I don't think water is such a good idea. I used gasoline to rinse after the Evapo-Rust treatment. I think acetone would work well as a rinse agent too.


Thank you for your indulgence,

BassCliff

[1_v8_merc]

Use acetone to remove Tank Liners, pour it straight(do not dilute with water).
If you pour 1 gallon in, just let it sit for 5 days, let the tank sit in a different position every night, so it covers all sections of the tank.

To dry out the tank, there's tons of ways.
I would just use washing soda + hot water...or soap. Then swish around a little acetone or gasoline.