I don't have to look in the tank, I can see it when I take the cap off, white corrosion all over it. I don't know if all the EZs I have are like that but I know some cleaning is gonna happen. Got any ideas of what to use to clean that stuff out? I tried a little wire brush around the threaded area of the tank and it didn't do much.
No, I still do not have a good plan for cleaning a chainsaw gas tank. I used gun bore brushes on a rod long enough to reach into the tank and spun them on a small vari speed drill, lacq thinner, acetone, and just a PITA.
But a Redneck idea that I've used on other tanks: (that reduces the physical workout pain of cleaning)
I've cleaned the larger gas tanks from auto's and some of the old metal small engines gas tanks that I'm going to Red Kote the insides by jacking up the rear tire on my tractor and strapping them to the tractor rim and using a piece of old carpet for padding between the tank and the wheel rim and just letting the slow spinning tractor tire tumble them with a piece of old porch swing inside and just use little bit of water at first and I can go do other things in the meantime. I park the tractor within reach of a water hose so I can rinse them out while they are still attached and go again until the rinse water comes clean.
I've had to let the tractor spin some of the really bad tanks for as long as 3-4 hours.
I'll probably do the same tumbling routine to the next chainsaw that needs a good gas tank cleaning placing some small items inside to get the little crevices scrubbed clean.. I would not red-kote the chainsaw tank, once the saw tank comes clean the gas/oil mix will keep it good for long time.