Measure connection

[carlosking450 149]

Hi I would like to know if the carburetor fuel connection is 1/4 "or 1/8"?

[Digger 66 3,476]

Are you referring to the thread size & pitch or the size of the line ( tubing ) ?

[Ed Kennell 35,629]

http://www.engineeringtoolbox.com/npt-national-pipe-taper-threads-d_750.html

[carlosking450 149]

I mean the part that screws into the carburetor

[rmaynard 14,865]

Carlos, what you have is 1/8" pipe threads. That fitting is made by Parker-Hannifin. Part number is 68VL 3-2. It has 1/8" pipe threads, and hold a 3/16" tube. This fitting includes all three pieces, including the rubber gasket.

 

 

Edited June 7, 2017 by rmaynard

[carlosking450 149]

Hello again friend, the blue thread is 1/8 "but what is the measure of the red thread?
I will look for it in specialized stores in Spain.
Thank you

[pfrederi 17,129]

  7/16" diameter  24 Threads per inch  NPSM  National Pipe Straight Mechanical

 

Found a source...name has changed over the years Now Parker Vibra lock not Imperial

You have 3/16 inch tubing (at least that is the size on my 1965  K241)  It is stamped on the fitting

 

You will also need the rubber sleeve

 

 

http://www.lesman.com/acatalog/Parker-Vibra-Lok-Fitting-61VL.html

 

 

 

Edited June 7, 2017 by pfrederi

[rmaynard 14,865]

As Paul said above, the nut that you have circled in blue has straight threads 7/16"-24. Hopefully you can find a local source in Spain. I have a complete new fitting (all 3 pieces) that I can send you for free if you can't find it,  but postage and duty to Spain might be cost prohibitive. 

[Digger 66 3,476]

I have to ask :

Why not just run barbed fittings with F/I line & Otiker ( stepless ear ) clamps ? 

My F/I fittings on my Can-Am are done that way and that is running 51 PSI .

I doubt the tractor fuel pump produces that much .

 

 

 

 

Edited June 7, 2017 by Digger 66

[Ed Kennell 35,629]

On ‎6‎/‎6‎/‎2017 at 9:34 PM, Ed Kennell said:

http://www.engineeringtoolbox.com/npt-national-pipe-taper-threads-d_750.html

Carlos, if you open this link and scroll down to the chart, you will find the nominal pipe OD for all taper pipe sizes in the last column. 

  1/8" NPT is 0.405"OD.  1/4"NPT is 0.540" OD.

[carlosking450 149]

Hello friends my kohler has the pipe and the nuts, but the rubber seal is very broken, I will try to look for a similar board.
But I find it will look for a connection with the same measurement of the red circle and at the other end a fluted tube with clamps. It would look something like this:

But not the measurement of the thread of the previous red circle, could be 1/4?

[Digger 66 3,476]

27 minutes ago, carlosking450 said:

Hello friends my kohler has the pipe and the nuts, but the rubber seal is very broken, I will try to look for a similar board.
But I find it will look for a connection with the same measurement of the red circle and at the other end a fluted tube with clamps. It would look something like this:

But not the measurement of the thread of the previous red circle, could be 1/4?

 

That fitting is not tapered ^ 

The one in the red circle appears to be .

Lay it on a dollar bill or something then take the picture so we have an idea of what size it might be . 

[Digger 66 3,476]

This is standard , run-of-the-mill 3/8 " NPT from a local home improvement store :

 

[carlosking450 149]

Hello again I think it is not 3/8 "since I received that measure and to receive the link is not the same.

[Ed Kennell 35,629]

Carlos, if you open the link I gave you in post 10, you will see the OD of 1/4"NPT is 0.54"      3/8" NPT is  0.675"        1/8" NPT is 0.405".

The size of the NPT is roughly the ID in inches. of the schedule 40 pipe.