Gyrobob Serious Thumper Offline Posers ain't motorcyclists Posts: 2571 Newnan, GA Gender:

Re: That'll buff right out! Reply #30 - 09/01/12 at 09:54:17   I've worked on gas tanks using welding and brazing with both torches and MIG.  The old guy I learned a lot of aviation stuff from would just flush the tanks well, with the last "flush" being a small quantity of kerosene (or diesel).  It mixes with the oil and is much less volatile.  Then he'd let the tank sit in the sun for a while.  Then he'd have a blower of some sort (a hair dryer, even) blow into one hole in the tank with the other hole uncovered.  After 10 or 20 minutes of hot air blowing through the tank, it would be pretty much fumeless.  The final check would be a sniff test.  If it had very little kerosene smell it was okay.

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