Table of Contents
How do you date a Holley carburetor?
Decoding them is as follows:
- Three Digit – Example 763 > 7 – Year (1967) , 6 – Month (June) , 3 – (Third Week)
- Four Digit – Example 0798 > 079- Day of Year (would land in March) , 8 – 1978/1988/1998/2008.
What Zenith carburetor do I have?
Original equipment carburetors will have two numbers stamped on this tag. The outer circle will be the O.E. part number (ie Allis Chalmers, GMC, IHC, etc.). The inner circle will be the Zenith number. Aftermarket carburetors made during this period will have the Zenith part number only on the tag.
What is a 4160 carb?
The Holley 4160 carburetor was introduced as an updated version of the 4150 in the 1970s. The most noticeable difference in the 4160 is the thin secondary metering plate, which is used in place of the secondary metering block.
What do the numbers on a Holley carburetor mean?
Holley carburetor numbers are referred to as ‘List’ numbers. They are usually stamped on the carburetor body and preceded by the word ‘LIST’ or the letter ‘R’.
What does 3259-1 mean on a Holley rebuild kit?
While there are resources dedicated to decoding this code, it is unused by Holley when attempting to source a rebuild kit or service part. The second line contains the list number “3259-1”. We can use this to look up information like jetting, proper rebuild kit, available replacement parts and more.
What are the Holley list numbers?
Holley List Numbers. R-120 to R-1098. R-1125 to R-1847. R-1848 to R-2603. R-2612 to R-3602. R-3605 to R-4334. R-4335 to R-6260. R-6262 to R-6715.
Where is the carburetor list number on a 4150?
On the standard 4150/4160 models, this number will be located on the throttle lever side of the air horn. Depending on the age of your carburetor, the list number can begin with distinct markings. Vintage (pre mid-60s) is typically denoted with “R”, while later models can be stamped with “L”, “List”, or the modern convention “0-“.