Hi, I am in need of replacing the tachometer. I have Cummins 6BTA5.9's and bought a replacement Faria Tach but it doesn't read the right RPM, Reads to high compared to the other tach that i've proven to be reading correctly. Tried all the switches on the back. The p/n of the old Tach isn't visible anymore. Does anyone know what the correct p/n is?
2000- Maxum 4100SCA Tachometer
Linear Mode
