Thread about stuck carburetor float prompted me on this. Have a 1986 Honda Big Red 3-wheeler with metal gast tank. Dragged it out of the garage a month or so back to see if it still runs. It does but needs a carburetor cleaning and the inside of the tank above the gas line is obviously rusty. Probably the thanks I get for using ethanol gas. So how does one go about cleaning the inside of a gas tank?? Pour in sand and shake it?? Hire a pixie to go in and hammer it off??

I use molasses/water mix for stripping rust...picked the idea up from a poster on these fora, it works a treat.

Get a fuel tank cleaner and liner kit by Kreem. Dennis Kirk sells them online. 3 bottles consisting of a cleaner, etcher and epoxy liner. The kit comes with instructions.

When you get the liner kit be sure and order a couple of in line fuel filters that just splice into the fuel line.

Buy a plastic replacement if you don't want to go through all of the trouble. I have an 86 Honda 250 and they are available.

You're on track,....
I put coarse sand and a little fine crushed gravel in em', and stuff em' into the concrete mixer with an old blanket packed around to retain em'.

Rust,.....GONE.

Better adhesion for that Kreme stuff, though I can't say I'm a fan of it, and remain clueles as to how it stands up to ethanol, Sea Foam and Stabil.

GTC

GTC

I'm currently working on a tractor tank. I was impressed with electrolysis using my batter charger and washing soda. The tank is now sitting in my garage filled with 10 gals of vinegar for the final rinse.

TSP ?

GTC

1 gallon of white vinegar and 1/2 cup of salt ratio. Let sit for a week or so. Then neutralize with the same ratio of water and baking soda. Rinse and let dry.

I drag a chain down a gravel road behind the truck to remove rust from the chain.

I'm a big fan of POR15 products, and I used one of their fuel tank kits on an old Sears SS16 tractor fuel tank I have. It's been 12 years now and still looks like the day I treated it.
They're like 3M- they make products that work, and work well.

http://www.por15.com/Fuel-System-Restoration_c_17.html

That's a method that would remove all the active rust. Once the active rust is gone and if the tank is in good shape I don't see the need to coat it. Steel gas tank are not coated and are just bare steel on the inside.

If the rust had caused substantial pitting then coating it to fill in the damage and help prevent leaks would be a good idea but otherwise I'd be hesitant to put anything foreign in a tank.

Here's a link to a simple battery charger rust remover ...

http://antique-engines.com/electrol.asp

Put a bunch of steel shot in it and shake the snot out of it. A paint shaker would be perfect, but not very realistic.

Wow, lots of good stuff. I'll do my dd and try one or more of those. Thanks guys.

Find a dealer that will clean and epoxy coat inside. Done it at work a lot and now have one on a small tractor works like a champ so far.

Kreem worked for me on old dirt bikes.