Re: 1977 seacraft cc gas tank
PB blaster is a better penetrant, or use marvel, I would let it soak for a good period of time and continue to re-apply.
On frozen threads, you can also use a roll pin punch or similar and hit it with a hammer in efforts to loosen the crud holding it shut
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1974 Seacraft 20' SF with 1985 Evinrude 150 VRO
1987 Seacraft 23' Scepter with 2007 250 HP Evinrude Etec
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