No you need the GR-4 or GR-16 with a 797c2. The GR-50 requires more power to operate than the 797c2 was designed to supply as output to power the GPS Receiver.
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Can anyone tell me if this unit will work on my 797si?
No you need the GR-4 or GR-16 with a 797c2. The GR-50 requires more power to operate than the 797c2 was designed to supply as output to power the GPS Receiver.
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yep, he is right.