109 Adventure er Money Pit

[ol'George]

Muriatic acid is nasty shit and I have never used it for fuel tank rust.
it does have other uses.
I take a hand full of 1/4 nuts ( or gravel/stones) and put them in the tank and shake the tank vigorously for as long as you can, the longer the better.
if you don't have varnish type of crud in the tank, just rust, you only need a bit of your favorite flavor of liquid soap added.
When you figure you are done, wash it out good and let it dry in the sun.
You will have removed the loose rust, any remaining fine debris will be caught by the filter.
if you keep fuel in the tank it will not make new rust.
works for me.

[West Valley G]

Originally Posted by ol'George

Muriatic acid is nasty shit and I have never used it for fuel tank rust.
it does have other uses.
I take a hand full of 1/4 nuts ( or gravel/stones) and put them in the tank and shake the tank vigorously for as long as you can, the longer the better.
if you don't have varnish type of crud in the tank, just rust, you only need a bit of your favorite flavor of liquid soap added.
When you figure you are done, wash it out good and let it dry in the sun.
You will have removed the loose rust, any remaining fine debris will be caught by the filter.
if you keep fuel in the tank it will not make new rust.
works for me.

Works for me to every time

Ken

[finsruskw]

There is a baffle inside these metal tanks
This one is from a 102 that sat outside for decades.
It is the smaller version.
Your 149 should have the larger version.
Trust me, there is also a baffle in it, you can feel it with your finger.
I dunno, but this sure looks like a baffle to me!

[farmer52]

Well I am trying the Muriatic acid route. I called two (2) radiator shops in my area and one is "out of business" and other all I get is a busy signal!

I diluted the MA with water about 50/50. I sloshed the fluid and I do believe there is a baffle inside. If I tilted the tank side ways I could here the fluid drain into another "cavity". I tilted it in both directions. I am leaving it sit until tomorrow and then I will check it again. If this does not work I will buy another gallon of MA and use it full strength.

[RustyShackleford]

Let us know how it goes! The tank is definitely baffled. Keeps gas from sloshing away from the tank outlet so you don’t suck air into the fuel stream. You can use nuts/gravel/etc. but it’s a pain to get the pieces through the baffle holes and an even bigger pain to get them back out.

[ironman]

Not suggesting it, just FYI....watch the video
https://www.kbs-coatings.com/tank-se...mpaign=sema22a

[farmer52]

Interesting video. At least my tank does not leak so no concern about resealing. I just need to get the rust and "crap" out of the inside.

If the tank has a baffle I don't want to be adding gravel or small objects.

[West Valley G]

So I guess all the baffled tanks I cleaned without acid must be bad.
And yet after all this time they work, hmmm

[farmer52]

Tank cleaning round #1 did not go as well as I expected. It did however remove some of the varnish and cleaned the area above the old fuel level. There is still a fair amount of rust and other "stuff" covering the bottom inch or so of the tank. I poured in about 1/2 gallon of 32% Muriatic acid. I sloshed it around and will let it sit over night. The fuel shutoff and knock-off carb are scheduled for delivery today (Wednesday).

Does anyone know if 32% MA is the norm? Is there stronger available?

[ol'George]

Originally Posted by finsruskw

There is a baffle inside these metal tanks
This one is from a 102 that sat outside for decades.
It is the smaller version.
Your 149 should have the larger version.
Trust me, there is also a baffle in it, you can feel it with your finger.
I dunno, but this sure looks like a baffle to me!

That is a baffling problem.