FURUNO FM8500 VHF DSC
MMSI Number Change Procedure

1- Turn off the device and open the front cover.

2- While pressing the NMI switch (S1) , turn the device on.

3- Turn the device off again.

4- Turn the device on without pressing the NMI switch 

5- Select the EEPROM option and press ENTER.

6- When the screen displays “TURN OFF POWER”, turn off the device.

7- Turn the device back on, then go to:
SELECT → 9 → ID MENU, and change the MMSI number.

8- After that, set PROTECTION to OFF.