3 3/4" Tachometer Engine Cylinder Adjustments Installation

This tachometer is factory calibrated for 8 cylinder engines. For operation on 4 or 6 cylinder engines, a switch adjustment must be made.
1. Remove cup by placing the tachometer face down on a smooth surface. Remove the phillips screw on the back and gently lift the cup off to expose the circuit board. Take care
not to pull on the wires.
2. Locate the switch on the circuit board. Move each of the two switches to the proper cylinder selection according to the diagram illustration on the right.
4 Cyl.- Both switches down
6 Cyl.- Switch #1 down. Switch #2 up
8 Cyl.- Both switches up
3.Replace the case on the tach with mounting bracket at the bottom (make sure the wires are clear of the screw hole).
4. Replace the screw