O ring size for Fuel Pipe on 1980 carbs?

[HooplaDiem]

Hi all, I need to replace the O rings on the fuel pipe (joint set part 16037-426-003) between carbs 1 and 2. Any chance anyone knows the size so that I can order them ahead of time? Or really any way to make it easy? Buy a variety pack etc.? I'll have a short window in the garage next week to change them out, so I was hoping to have them in hand before I get there and can't take it apart until then to look for myself.

I already have some 3m x6mm button nose screws and loctite to replace the ones I'll be removing. I think the O rings are the only other things I'll need then. Sources or sizes for those would be appreciated if anyone knows! Any other words of wisdom for this task? I can't find much step by step info, but hopefully that just means it isn't too complicated.

Thanks!

[Volker_P]

I did that "some" years ago (never try to turn these tiny tubes for cleaning! )
Sorry, but it looks like I did not write these dimensions into my workshop manual then.

Possibly you find the carb manual helpful that is linked here: viewtopic.php?f=4&t=5056
Though it is for the CV carbs there are some useful hints on stepwise disassemble and on O-rings.

BTW, don't worry too much to figure out on every single part already before you know how your carbs look inside. Well, you asked for words of wisdom, didn't you ...

[HooplaDiem]

Looks like that manual link is now a 404 error

Any other sources you can think of for tips on how to remove and replace that part?

I winged it and ordered some 11ID x 2.5 o-rings. When I searched for the joint set, that was the size O ring that kept popping up with 'people also bought' and seems close at least. Worse case I can buy a new joint set that comes with the O Rings. Maybe I should have done that anyway. If I didn't get it right with my sizing I'll have to wait another month or so getting back to the shop.

Thanks!

[Volker_P]

yes ...revD is 404 now,
you have to scroll down, ...revG still works.
I already tried to clarify that in the link.

[HooplaDiem]

Update: Swapped O-rings out today on my 1980 carbs between the 1 and 2 carb fuel rod. Wanted to provide info that could be helpful for others. O rings I went with were 6ID 10OD and 2mm thick. They couldn't be any more snug without not being able to fit (used some gas as lube)- so I'm really hoping that does the trick. What I used for a reference was:

https://cosky0.tripod.com/imagelib/site ... et=tlx_new

and

https://cosky0.tripod.com/imagelib/site ... et=tlx_new

the parent site is:

https://cosky0.tripod.com/id4.html

Due to a million reasons/excuses/etc. I only ended up separating carb 1 from the rest, but things went pretty smoothly up to that point.

Perhaps this helps a lost soul in 5 years,
Katelyn

[Volker_P]

Thanks for the info.
So it seems the fuel connecting lines between the piston type carbs require 6x2 O-rings.
Did you check out for the T's (only between 1+2 and 3+4) and the accelerator pump tubes, too?