The Stovebolt Site Forums The Shop Area Engine Shop Leaky Carb @ Fuel Line

I have a Monojet on my 250. No matter how tight the fuel line is at the carb there still is some leakage. Actually it's more than just a little bit. The large filter bolt on the carb is tight and the fuel line attached to it is as tight as I can get it.
What gives? What suggestions?
2nd question. If I have an inline filter before the pump do I still need the brass filter in the carb. If so, which way does it go? Cone facing the carb or the nut? And the spring goes on which side?
Thanks in advance.

Is the leakage at the fuel line, or at the fuel filter "bolt"? Some carbs use a copper washer under the bolt to prevent leaks. Available at most parts places. If its a metal fuel line, check the flange @ the line to make sure its not deformed. Make sure the sealing surface in the carb isn't deformed. Metal lines can leak at the threads. Get some gas resistant thread tape and put a wrap or two on the line's threads before screwing it back together.

As far as the in-carb filter, I pitch them and use a good inline filter.

chip

Usually the leak is caused by a wrong fitting or missing seal. Chip covered the seal. The fitting on the bowl adapter, be sure that if you have a flare on the tube that you have a flare fitting, or if you have a compression fitting that all the parts are there. You really need to figure out which is leaking. Don't use any tape or sealant on the flare or compression fitting side, but do use it where the adapters fit together. There is one sealant designed specifically for use with gasoline, Permatex Hylomar. It can be used on the threads and on the gasket of the fitting to the bowl.

Thanks for the quick response. The leak is at the flare fitting to the large 'nut' on the carb. What is the proper name for that piece anyhow? I'll take another look at the flare to see if it has a nick in it or something. So what's the consenses on the sealing tape...use or not use?
Thanks

No sealant will cure the problem with the flare leaking. Be sure it is a double flare where the steel is folded back over. I can't remember the exact name of that fitting, got old-timers disease right now. Also be sure the tubing is straight where it goes through the nut on the tube, sounds like it could be bent, causing misalignment (and the leak). Time for bed for this old man.