Mercruiser 4.3 carb weep

[QBhoy]

Not sure you should ever need thread tape on a fuel fitting. Possibly even considered really poor practice even.
So is this the main fitting into the carb you mean ? There is sometimes a strainer mesh in there if it is. Is it that fitting you mean ? Has it been cross threaded for it to be leaking ?

 

[achris]

Not sure you should ever need thread tape on a fuel fitting.

If it's a tapered fitting, then you do need a sealant, like Loctite 567. (So the fittings torque up correctly).
If it's a flared fitting, NEVER!

Possibly even considered really poor practice even.

Very!

Chris..........

 

[Lou C]

The only fittings I used gasket sealer on are the metal drain plugs for the engine block & exhaust manifolds. I have used Evinrude gasket sealer and Permatex Aviation for this. When I still had those old OMC one piece exhaust manifolds the drain on the starboard side was right above the terminals on the starter solenoid. Really didn’t want that one to leak! Now I have the Barr Marine version of the 2 piece style used later by OMC & Volvo these have the drain way at the back. Also used the Permatex on the cyl head bolts when I replaced the heads.

 

[Scott Danforth]

Flared fittings, like JIC, Swagelok and inverted flare (think power steering, fuel pumps etc) rely on the flare to seal, no the threads. The threads are they just to force the flared parts together, hence the lack of need for any sealer on the threads. That would be like throwing your fishing line onto the land to catch fish. Just

Thread sealers (like the Loctite 567) have a PTFE component as well as the sealing chemicals, hence they CAN be used as a sealer. Straight PTFE/plumbers tape is JUST PTFE, and thus IS NOT a sealer, it's a lubricate so the threads don't gall before reaching the right torque to actually seal. And it's usually tapered threads, like BSPT and NPT... Parallel threads usually have a washer or Dowty seal behind them.

Chris......

but did you punch the monitor?

 

[achris]

but did you punch the monitor?

Only several times!

 

[Tail_Gunner]

Only several times!

Grumpy old men need a few punches from time to time. It's a bit like a reset button.
Strictly a opinion your mileage may vary