The IM-106 instruments have been designed especially to measure the RPM in Rotax® engines with Bosh Ignition System.
The IM-106 is available in 57 mm diameter.
The IM-106 not need external power suply.
The minimum instrumentation requirements for the BRP_ROTAX® two stroke engines include a gauge for continuous RPM monitorization.
The AVIASPORT IM 106 tachometer is specially designed to be connected to the BOSCH magneto generator mounted in the old ROTAX UL engines , but it can also be connected to other similar generators.
Unlike most of the existing tachometers, this one is connected only to the AC output ( lighting coil ) of the engine. This avoids the risk of stopping the engine if a failure in the instrument or connecting wires causes a short-circuit. It takes its power supply from the AC output, making connection to DC power unnecessary.