small o-rings in carb - size and source

[Don Montgomery]

George, Thanks so much for the info, it should get me on my way. I'll compare these dimensions to my best guess of what the ring was before going into service. Maybe True Value of NAPA will have them. Don M

----- Original Message ----- From: "George Bynum" To: Sent: Saturday, August 29, 2009 7:38 AM Subject: re:Small O-Rings in carb - size and source >> Small O-Rings in carb - size and source. These are the ond in the idle >> scew assembly, the fuel and vent assemblies and the idel air valve >> assemble, May have missed one. >> >> If anyone has this info at hand or a link, I'd appreciate knowing what >> the >> sizes are and if True Value quality o-rings would be fuel resistant? > > I cannot answer sizes as I've not had to go into mine YET ... but from > Google, I found http://sudco.com/carharori.html which may help. > > That info is here .. > > Sudco pn Keihin Reference Location ID Section > 018-664 16173-001-0040 - 18.5 2.85 > 018-694 16075-MB0-0030 - 7.9 1.40 > 018-722 0901-006-6000 - 2.65 1.90 > 018-755 W9351-13057 Fuel T-Joint 5.65 1.33 > 021-043 16075-KG8-9010 Pilot Screw 2.7 1.20 > 021-047 16958-397-7710-M1 Needle Seat 9.1 1.30 > 021-067 W9353-36000 U-Ring 3.55 1.95 > 021-070 W9353-11042 Accelerator Pump 4 1.05 > 021-071 16178-548-0040 - 5.8 1.90 > 021-097 W9353-6500 U-Ring 6.35 2.95 > 021-109 16075-935-0060 Drain Bolt 15.15 1.95 > 021-527 0901-069-6000 Choke O-Ring 8.95 1.35 > 021-732 16978-ZB9-0050 - 11.75 1.94 > > The variety of sections is confusing; "common" o-rings are the standard > sized in an old military AS568 standard and have sections ("width") which > don't match these ... nor are they standard mm sizes I see in industrial > hydraulics. Keihin must have specials made. > > For a list of AS568 o-rings, one source is > http://www.efunda.com/designstandards/oring/oring_as568.cfm > > As for True Value o-rings, I'd feel comfortable with them; they are > almost certainly 70 durometer Buna which is fine for gasoline. > >> Thx in advance, >> Don M > > > George Bynum > ElectroHydraulic Systems Engineering > Greer SC 29650 > 864 419-7862 cell > www.oilyelectron.com >