Definitely wouldn't hurt, I roll with the white plumber's tapeputting a new mechanical fuel pump on and switching the fitting to a 3/8 barb to match my carb. When I put the new barb in do I need to use some sort of sealant on the threads?
plumbers tape is not recommended for fuel fittings as it can tear during installation and end up in the fuel. Use Permatex HP thread sealer.
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I agree with this^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
plumbers tape will be better than nothing, as long as u don`t go over the end where it can be cut and get in the system, and wrap it in the right direction.