Shallow Water Alarm!! Please Help

[Proud Dad]

The Motor has less than 100 hrs on it, Tattletail is strong, Oil stays full, I will try to disconnect battery this afternoon and see if it resets! I pulled up last sunday to the LaBerge Beach Party Engine must having taking in a lil sand and alarm went off, I backed up in deeper water and alarm shut off , It ran fine the rest of the day!! Yesterday I launched at Prien Lake and it came on when I cranked engine, I turned off engine then restarted and Alarm stopped!!! Ran it to Civic Center, Ran fine and smooth for about 20 min then alarm came back on and would not shut off , I had to ideal 1 1/2 hr back to prien lake lastnight... First Boat I ever Had so new to all this, Really appricate all help, and really like being apart of Salty Cajun.com!!!