use teflon tape on a gas fuel line?

Should I have used a different material or going brass into brass was I wasting my time anyway? I didn't wrap when I reinstalled coz I was worried about particles of teflon plugging up the jets, etc. Thanx.

Another flag on teflon tape is that if you use it, make sure to leave the first couple threads bare. Loose pieces of tape that get into your system can muck up hyduralic systems, pumps, and other small orfices.

Teflon tape - - - clean in the tool box, but not necessarily the best material to use.

My 2 cents worth..... ..

I put the teflon tape around the threads that screw into the brass receiver on the carb as I thought it would make a better joint. I did not obstruct the hole in the end of the fitting but it all dissolved anyway. When I unscrewed it about 2 weeks later the teflon was in transparent shreds, what was left of it.

Whether lubricant or sealant I had always thought teflon was inert and resistant to everything in the known world. I have a jar of teflon trailer ball hitch and I use it on all kinds of things besides teflon joint tape. Maybe I should have gone that route for this joint. But like I initially said, probably brass on brass is such a good joint that I was wasting my time wrapping it anyway!

Yes, this is probably the same threaded brass barbed fitting that somebody asked about, with that stupid ring on it that I cut off with some dykes just to get it gone. I think I got the fittings tightened well enough with nothing there to prevent any seepage.

Thanks again.

Even the old stick pipe dope does not say "sealant", it is to smoothe things out till they get tight.

Years ago I had a contractor putting 2" pipe in a pipe rack for an air distribution system. He had inexperienced hands and they were cutting threads too deep. With the threads too deep, the thread bottoms out in the fitting and won't make up. They kept trying to put pipe dope on to seal until we found out what was happening and made them unscrew 3,000 ft of pipe and cut the extra thread off so the fittings would make up right.

Tapered threads seal just fine with a little light oil as lubricant and if they don't seal something is wrong.

A Farmall fuel line is certainly low pressure, some of my in-line filters even get by without a clamp, but if a tapered thread joint is seeping it is not made up right.

Tapered pipe threads that leak will seldom be sealed by the application of a lubricant except that you can get them tighter. If there is very low pressure then the dope will seal for a while.

Brass is not bad to gall against itself, but aluminum is. On a diesel carburetor with the pot-metal body, I always use a little pipe dope or oil for lubricant.

It makes as much sense to put dope on flare nut threads as it does on tapered threads. If you need the lubrication, use it.

Teflon tape dissolved by gasoline and burned in the engine does no harm and the joint was still lubricated when assembled.

Hydraulic fluid and motor oil will not dissolve teflon tape so it is a problem in those services by small pieces plugging orifices.

I use a teflon paste on hydraulic lines. Looks like dope, feels like dope, never hardens.

Just my 2 cents…

Work well for the most part, it is on hand most of the time. Try to keep on the treads and not near the gas flow. I wouldn't say it was dissolved it had gotten wet and then looked like it was. Put teflon near oil it looks the same way, gas is oil in a way.

Teddy