Tachometer with hourmeter for Detroit Diesel engines -mechanical LH 1:1 2500rpm ( 3 1/2" diameter) . This mechanical tachometer is designed for the most heavy duty marine, industrial and automotive applications.  With black background, chrome rim and white needle you will find your Detroit Diesel engine rpm reading to be extremely clear.  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 RPM has 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 tachmeter is remote mounted on your 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 the engine RPM 1 to 1 reading).

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