Faria Kronos 4" Tachometer 4,000 Rpm Diesel - Mechanical Takeoff & Var Ratio Alt

Kronos 4" Tachometer - 4,000 Rpm (Diesel - Mechanical Takeoff & Var Ratio Alt)- 4" - Hole Size: 3.375" (85Mm). Electronic Tachometers Work By Counting Pulses Generated By The Ingition 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 Postion You Let The Tachometer Know How Many Pulses Are Sent Per Each Engine Revolution.. Benefirts:-. Wide Range Of Scales. Multiple Signal Sources. Rugged, Reliable Construction. Faria Kronos 4" Tachometer - 4,000 Rpm (Diesel - Mechanical Takeoff & Var Ratio Alt). Faria Kronos 4" Tachometer 4000 Rpm Diesel Mech Takeoff. Boat Outfitting. Gauges,Marine Instruments. Gauges. Faria Beede Instruments39007. 759266390072.