New fuel lines question regarding 3/16th line existing,changing to 5/16th

[David Tweet]

Existing was 3/16th tank to pump to carb. All new brakes etc.,now fuel line...Thought I'd just reduce when at pump and carb but not finding reducer, not the move. . Guessing it's different pump with 5/16th inlet/outlet?

Go back to 3/16th?  Have one old reducer was at tank, male 5/16th to tank, female 3/16th that the line connected to. It's just not right eh? 

Thanks, Appreciate the input and site, couldn't have got this far without y'all.!

[Tooljunkie]

No way it was 3/16”. 1/4” maybe. Style of fitting at tank would help. 

[Dodgeb4ya]

Geez ...3/16"....1/4"?

Noooooooooo!

All steel lines 5/16"...like from the factory.

[Countryss]

Just did mine. 5/16 all the way tank to carb. Got a 25'coil and had 3 connections at the tank, midway on rail, and at fuel pump

[squirebill]

Tubing is measured by it's outside diameter.  Pipe is measured by it's inside diameter.  Are you going by the inside or outside diameter?  3/16 OD tubing seems very small for a fuel line.   1/4 inch OD tubing would have an ID close to 3/16 inch. Just saying.  Regards.

[Slickster]

Yeah.  5/16....

[David Tweet]

Hello, Yes its 3/16. I just hand formed all brake and oil lines (5/16,1/4, 3/16),new cylinders,relined shoes,painted frame etc... .the fitting at the tank was a reducer,  5/16 male threads into tank, female accepts 3/16 line. It ran like that for years, I think I need carb/pump with 5/16 in/outlets. Don't know why they did it but can't leave it as  I'm bringing back to stock! Ha it's always something eh!