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tank cleaning

  • Thread starter Thread starter biker_guy
  • Start date Start date
Paint stripper has loosened up most of the old Kreem in my tank. The aquarium rocks I dumped in to help scourer the metal surface really helps. The challenge is getting the hump portion of the tank clean since rotating the tank and sloshing the solution back and forth doesn’t get those rocks up on the reverse curved surfaces; the outer surface of the tank seems to be Kreem free, but I can see some residue on the hump. A screwdriver stuck in through the filler opening demonstrates that the remaining coating is soft but it’s not going to just fall off without some abrasion to scourer the surface. I’m going to try some water soluble paint stripper next with even more rocks – bought a bag of pea gravel from Lowe’s. Hopefully, the water soluble stripper will be strong enough to soften the last of that old Kreem, and being water soluble it should be easy to flush out before starting the derusting process. Shaking those rocks around inside the tank is a real workout, hopefully it won't be for much longer.
 
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+5 billion on the in-line filter. I have always kept filters between the gas tank and carbs on everything i've owned. That includes bikes, ATVs, cars lawnmowers etc. Don't just guess that you got everything about and that nothing will fall into a carb and clog it up. If you throw a filter in there, anything coming out will be caught and all you have to do is pull out the filter and replace it!

That being said, I am not saying to not clean the tank. Just don't forget the filter.
 
Problem with filters is that only a coarse filter will flow without fuel pressure. The type with a gold stone inside flow easily with a gravity feed fuel system, but they don't filter that great - rust will still get through and into the carbs.
 
A little update for those that are interested.:)

After stripping out the old Kreem in my 1000S tank, I tried some Evapo-Rust first. I think this stuff is the way to go. Only issue is that you need to throw in some pea gravel or aquarium rocks to scour the metal because the Evapo-rust coats the metal with a rust colored film so it's hard to see if all the rust is gone yet.

I also experimented with some phosphoric acid as well. This stuff also does a good job of eating the rust but it leaves behind a chalky residue. After rinsing, some pea gravel is needed to scrub down the surface of the tank and remove the residue.

To coat my tank I used POR-15. Swished the stuff around for about 30 minuets and then dumped out as much as I could get out through the petcock hole. There was still enough to flow around so I kept rotating the tank to coat the inside and avoid a puddle on the bottom. The coating finally started to kick off after an hour or so - wound up with a nice thick layer. Good stuff. Used the left over stuff to hit some rust spots on the underside of a different gas tank. Waste not, want not.:)
 
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