2007 SN Speedo Problem

[hogexpress]

I have PP and ZO on my boat and have just taken the PP gauge out and reinstalled the Factory Speedo gauge. I'm having a problem getting the gauge to calibrate correctly. Am I correct in thinking the Speedo signal is coming from the PP paddle wheel? I am aware of the Calibration Knob under the right end of dash. Turning it only makes the needle very sporadic.
On a side note, while PP gauge was installed the speed on the gauge read consistantly but always a couple mph off ZO.
Any suggestions would be appreciated.

[Quinner]

Previous years worked like: To calibrate the speedo push and hold the "M" mode button down for 2 seconds, will get you in calibration mode, LCD should say adjust, run at 30mph gps and use up down arrows to match. Press "M" again, when screen displays "save" press "M" again holding for 2 seconds.

Sent you a PM also, so check your messages

[hogexpress]

Quinner,
Thanks for the reply. Mine is the SE model with 'no buttons' gauge. White Lake Marine helped me out with this. The red and white wire coming off the Calibration Knob under dash actually gets attached to the 'unlabeled' mounting terminal on back of gauge. Got your PM and will reply momentarily.