Taylormade Posted May 23, 2013 Share Posted May 23, 2013 My gas tank sending gauge gears are totally gummed up with varnish from 45 years of sitting. The stuff is hard as rock and I'm afraid I'll damage the brass gears trying to get it off. Is there anything that will dissolve this varnish without harming the metal parts of the unit? Link to comment Share on other sites More sharing options...
Guest Siegfried Posted May 23, 2013 Share Posted May 23, 2013 Years back I restored a few gas tanks that had rock hard fuel in them. I used straight acetone to soak it out. However, I am not sure if acetone will harm brass. It was fine with steel tanks. Link to comment Share on other sites More sharing options...
Taylormade Posted May 23, 2013 Author Share Posted May 23, 2013 I'll try it. I've never had acetone react with brass in the past. Link to comment Share on other sites More sharing options...
Larry Schramm Posted May 24, 2013 Share Posted May 24, 2013 Alcohol is a great thinner for varnish. That is one of the problems with older cars that have been sitting for a while and E-10 gas/alcohol blend is used. It can plug up fuel filters, etc along with damaging hoses, etc. Link to comment Share on other sites More sharing options...
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