Try this method.
Cub Cadet FAQ
Thanks alot TMO
I got a gallon of Mauriac Acid from the hardware store for $5.50
I filled the tank to 1/2 full of water and dumped in 3/4 of the Mauriac Acid into the tank.
Left it sit for 20 minutes and flipped the tank over and let it cook for another 20 minutes.
I dumped the mixture out and it came out Brown.
Stuck the garden hose in it and left it flush for 5 minutes and took a look inside the tank with a flashlight.
It looks like Brand spanking new.
I then mixed a quart of Gas with some old 10/30 oil I had sitting in the back of the shed and coated the inside of the tank.
After coating it I emptied the tank and let it dry and bake in the sun for a few hours.
We're Golden with the tank.No leaks and it's cleaner than a whistle.
Now if I haden't dropped the sediment bowl on the stone step going into the shed and busting it
:wallbanging:,I could fill it with gas.