4" OEM Tachometer with Hourmeter (4000 RPM) *Bulk Pack of 12 Gauges

Electronic tachometers work by counting pulses generated by the ignition system, alternator, tach signal generator or magnetic pickup sender. The tach is hooked up to +12vDC, Ground and one of the signal sources listed above.

By selecting the right tach and setting the switch on the back to the correct position you let the tachometer know how many pulses are sent per each engine revolution.

Features:

• 0-4000 RPM
• 4" - Hole size: 3.375" (85mm)
• Includes hourmeter
• Battery ignition pulsed
• Wide range of scales
• Rugged, reliable construction
• 7 character LCD display
• 12V
• Black bezel
• Bulk Case of 12 Gauges