Just one question: Why would you want to pressurize the tank? Isn't it better to just let gravity feed the carb? You don't need high pressures for a carb setup. What's the performance aspect of it? TIA!
I tried a 2 part epoxy on the sanded surface and it still didn't want to hold. I'm guessing the outlet broke off. Best to probably thread a new plastic outlet in there and seal it with a gas proof sealant or just get a new one for about the same price.