Fuel line ferrule

[Nautiluscont]

I purchased a new steel fuel line for my cub from Steiners and installed it yesterday, however it leaked at the carb fitting. I have worked with compression fittings in the past but not ones that are one piece like the IH ones. To start with, the fitting was extremely tight and barely slid on the line. I read a lot of posts on here about people having issues with getting the one piece male/ferrule to tighten and separate. I have tightened it quite a bit but certainly don't want to strip out the carb inlet. Neither of the ferrules separated on either side of the line. At first, it also leaked on the fuel strainer side but more tightening fixed that. The ferrule on that side didn't separate either. Some on here suggest buying a female fitting and using that to tighten and separate the ferrules off the tractor as not to strip or crack the inlet. Anyone have a make and model of a suggested female fitting for this or any other suggestions?

I appreciate the advice in advance,

[Bob McCarty]

If the steel line is coated, you may need to sand off the coating so the ferrule can slide on it. Any good hardware store should have a brass female fitting for a 5/16" line.

[k hutchins]

I purchased the same fuel line last summer for my "new" '48. Bob, they aren't coated, the ferrules are just real tight. You can't turn them by hand.
I wasn't real impressed with the line. I had to to tweak the bends just to get it to line up correctly so l didn't cross thread trying to get it attached.

A thought l had is to take the carb off, attach the line so you know that it's right and tight, then remount the carb.
Just a thought.