I have a 2018 280 SLX with an 8.2L MAG & Bravo 3. The digital display is from Medallion. Yesterday I noticed that the speed indicator was jumping all over and then dropped to no signal. The boat ran fine. I initially thought the speedo tube on front of out drive became blocked but then I noticed that my map was not working either. The map display indicated that there was no GPS signal. I guess my speed indicator is from the GPS signal. Does anyone have any ideas on how to trouble shoot the loss of GPS signal?
