This heavy duty tachometer with hourmeter is designed for Detroit Diesel engines - Mechanical clockwise rotation with a 3 1/2 inch display diameter and 0 to 2500 RPM reading range is fast, easy and clear to read.  Used in marine, industrial and automotive applications.  With black background, chrome rim and white needle you will find engine RPM to be an indispensible companion.  Each mechanical tachometer comes with a 100% money back guarantee and will ship direct to you within 24hr worldwide.  

Detroit Diesel:  Use this tachometer when:

1.- The reading is taken from camshaft gear and the tachometer is directly mounted on the back of the engine (Camshaft to engine RPMhas a ratio of 1 to 1

2.- The reading is taken from blower and the tachometer is remote mounted on your instrument panel ( Blower to engine RPM ratio is 2 to 1. Use tachometer angle drive with a 1 to 2 ratio to obtain the engine RPM 1 to 1 reading).

3.- The reading is taken from the accessory drive gear and the tachometer is remote mounted on you instrument panel.  Accesory drive gear  to engine RPM  ratio is 2 to 1.  Use tachometer angle drive with a 1 to 2 ratio to obtain engine RPM 1 to 1 reading.

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