Description
Comparison points and tradeoffs
When comparing N228 UN2 Replacement Main Adjusting Needle Assembly 131-66 / ZENITH Adjustable Main Jet fits carburetor 14275 14475 power valve adjuster A57 with other Jets options, use this source-backed detail as the primary discriminator: Referenced part number: 131-66.14275A.
Use this second fact to evaluate the tradeoff: Application note: These only work on the aftermarket carburetor, it will not fit anything else. A third point to compare across alternatives is: Product identity: N228 UN2 Replacement Main Adjusting Needle Assembly 131-66 / ZENITH Adjustable Main Jet fits carburetor 14275 14475 power valve adjuster A57.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
Newly made parts, finely tuned Rochester B/BC (1V) Carburetor.The carburetor in the picture is for reference only. This list only sells Main Adjustment Needle Assembly
Source product highlights
About this item
- Main jet adjusting needle for the N258 (UN2) carburetor. These only work on the aftermarket carburetor, it will not fit anything else. These do not need to be changed during a standard rebuild.The carburetor in the picture is for reference only. This list only sells Main Adjustment Needle Assembly
- Part Number: 131-66.14275A 14275B 14275C 14275D 14275E 14275F 14275G, 14475A 14475B 14475C 14475D 14475E 14475F 14475G
- For Rochester B/BC (1V) Carburetor.Zenith 228 (28 ) series carburetor numbers:14275,14475
- Specific parts are only suitable for installation on the carburetor shown in the second picture




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