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Magneto Synchronizer working?

A

alcladrv

Well Known Member
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
 
alcladrv said:
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
Click to expand...

Touch the red or green aligator clamp to the black one, then it should go off. I buzzs with an open and goes off with a closed circuit. Timing is set by points opening (i.e. open circuit) and this is what it indicates via buzzing.
 
Last edited:
With the unit turned on, when I touch the L or R lead to the Black one, the respective light goes out and the buzz continues but slightly changes its tone.

Thank you for a helpful response lr172.
 
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