Here's a table from The SU Reference Catalog (9.6) 1994 by Burlen Fuel Systems:
Paint Color Type Load @ Length Part No.
Light Blue A 2.5 oz @ 2.625 in. AUC 4587
Red A 4.5 oz @ 2.635 in. AUC 4387
Yellow A 8.0 oz @ 2.750 in. AUC 1167
Green A 12.0 oz @ 3.000 in. AUC 1170
Red B 4.5 oz @ 1.530 in. AUD 4355
Yellow B 8.0 oz @ 1.530 in. AUD 4389
Green B 12.0 oz @ 1.530 in. JZX 1088
Red & Green A 11.25 oz @ 3.875 in. AUC 4826
Light Blue & Black A 4.5 oz @ 3.875 in. AUC 2107
Light Blue & Red A 18.0 oz @ 3.875 in. AUC 4818
Types:
A - spring for normal suction-chambers
B - spring for ball bearing suction-chambers.
The last three are used in 2" diameter throttle carbs only.
AUC 2107 replaces AUC 5014 Red & Black.
AUC 4818 replaces AUC 2091 Blue & Green.
Does that help? I hate to think what Mike thinks of Light Blue and Black...
Bob
Awgertoo@aol.com wrote:
> What are the colors of the various SU carb springs and how do they range from
> weak to strong?
>
> Best--Michael Oritt
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