1A3 Tachometer Sending Unit
The 1A3 Tachometer Sending unit is designed to screw into the engine's mechancial
tachometer port (Lycoming/Continental style).
Included is a .156 diameter tang along with a 6' harness (other lengths available). Franklin engines require
a different tang. The 1A3 TSU is designed to work with UMA TSU tachometers only. Optional equipment on
the engine may complicate installation (See 1A3 Drawing).