That they know their business is amply testified to by the world-wide success of the Zenith. Therefore, we ask you to believe that every part of the Carburetor is well designed for its purpose and should not be changed or modified except as indicated in our printed instructions.
The jets especially should not be altered. They are carefully gauged at the factory, tested for flow of gasoline and brought to a standard size according to the number stamped on each.
If any difficulty is experienced with your Carburetor take your car to the nearest Zenith Service Station. If this is impossible, write us full details of your trouble. Always give the Model Number of the Carburetor (See letter and numeral cast on side of Carburetor, as O4, L6 etc.) the make, year and model of your car, the bore and stroke and number of cylinders of your engine. Immediate and full attention will be given and the utmost will be done to see that you get the full satisfaction and service out of your Zenith Carburetor that you have every right to expect.