General Category > Quadrajet Carb Talk and Tips

17057231 jet/rod combo from the factory

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Cadman-iac:
  Trying to verify if this has the correct parts in it. The jets in it now are 73's and it's got 43B rods and I think they have been changed at some point.

 Thanks

Kenth:
Should have #70 jets and 48P pri rods. Sec rods stamped DS.

43B rods for 1974 or earlier 4M Q-jets are longer than 1975 M4 Q-jet rods.

Cadman-iac:
  Thank you, I thought the rods were too long after measuring them and checking Cliff's book. I appreciate your help Kenth.

GSP7:

--- Quote from: Kenth on February 09, 2025, 01:03:49 PM ---Should have #70 jets and 48P pri rods. Sec rods stamped DS.

43B rods for 1974 or earlier 4M Q-jets are longer than 1975 M4 Q-jet rods.

--- End quote ---

Kenth,
 '75 and newer are .036" tip and 74 and older are .026" tip, is that correct year range about tip size?


.,

Kenth:

--- Quote from: GSP7 on February 09, 2025, 04:28:52 PM ---Kenth,
 '75 and newer are .036" tip and 74 and older are .026" tip, is that correct year range about tip size?


.,

--- End quote ---

Only 1975 and later M4 primary rods with D, M and S suffix uses .036" power tip. All others have .026" power tip.

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