I have a TP-105 Magneto Synchronizer aka "Buzz Box". The last time I tried to time the left magneto on my -7A, it didn't seem to work. All 4 - AA batteries inside the case read at least 1.57 V each. When not connected to any magneto and with the power switch selected On, both lights burn steady and both buzzers put out a steady tone.
What else can I do, disconnected from any magnetos, to verify the unit operates correctly?
Thanks
What else can I do, disconnected from any magnetos, to verify the unit operates correctly?
Thanks