Depth sounder delay

[Kwh23]

Just bought a used 2020 R23. The depth sounder will not display depth until the boat has been underway for 10 minutes or so. This happens each day without fail. Wants the display begins, it works fine until next day. Any ideas?

 

[venajeff]

I actually doubt that this is causing that problem but I would check the fluid level in the transducer hull mount. It's a common issue with the antifreeze leaking. Usually it just stops working all together though. What is the display showing when it is not working?

 

[bob daily]

Low voltage going to the chart plotter (gps)
Check house batteries, after running for 10-15 min you have enough voltage from your alternator to charge the batteries up to needed voltage for the garman.
Hope this helps solve the mystery! Bob