1 1/4", 2 1/4" & 3 1/8" Aircore Propeller tach for Rotax912/914 engines, connects to tach coil, calibrated to Propeller RPM, not Engine RPM! Custom color marking available, internal light optional! Hourmeter can be set to count engine time or flight time and preset to any numbers ---(must be done at UMA facility)!---Standard setting 800rpm & above. White or Antique yellow dial with black numbers available, per request!