4" HD Tachometer (4000 RPM) Diesel (Mech Takeoff & Var Ratio Alt)
Hole Size: 4" gauge (3.375" [85mm] mounting hole)
Perimeter-lighted black dial with bold white graphics, black aluminum SAE
style bezel, contoured white pointer and flat glass lens.
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 hte 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
- Wide range of scales
- Available for gas or diesel engines
- Multiple signal sources
- Anti-scratch glass lens
- Plastic Cases for corrosion resistance and long life