No core charge! Throttle bore: 1.65″. Mounting bolts center to center: 3-5/16″. Choke ID: 2-1/16″, OD: 2-5/16″
Rebuilt OEM Zenith 69 series carburetor. Vacuum operated accelerator pump. No core charge!
Includes new adjustable load jet part# AR46109 (mounts in side on bowl).

Replaces: R4020, AR34243, AR45162, AR52450, 12510, 13209, 13320, 13430, 13450, 13750, 14990, 15099
Replaces Marvel Schebler: USX20, USX29, USX30, USX32, USX33, USX35, USX37, USX40, USX43, USX44, USX45SL, USX47SL, USX48SL