Reply To: Best Way To Clean Years Of Sludge From Fuel Tank?

[aquasonic]

After trying out many different cleaners for aluminum tanks, probably the most effective for removing old fuel mix deposits was ammonia. Best to remove the filter screen and replace it with a 1/2″ brass plug from a plumbing supply prior to shaking. Otherwise, the hardware that you are using for the mechanical removal will damage the intake filter screen.

Time and patience are the key here. You can shake the tank, then set it down on a different side each time for even treatment. This can take days instead of hours and may require a couple of rounds. I do recall a member that set up a drill with a drum sander to rotate a bicycle wheel with the tank attached.

No matter how well the tank is cleaned, expect more stuff to come out after it’s put into service. After fuel mix sits in it for months, the last of the most stubborn crud will come out.

Regarding the two-piece cast tank, I wouldn’t take it apart unless it is leaking, or you want to restore it. There is no gasket between the halves. Permatex anaerobic sealant is one product that will work for the reseal and is available widely. A thin coat is all that’s needed. Of course, preparation is the key with good clean mating surfaces.

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