Need ideals for beat diagnostics. Diacom fault codes with 5 beeps every 60 secs
 

Mercury 525 EFI with 3.3L whipple. Left boat ramp and engine died when shifting to neutral. Restarted fine. Set alarm after getting on plane with 5 beeps and repeated every 60 secs the rest of the day. Instaled my Rhinda Diacom scanner when I got how and had history faults, CAM SNSR, and data disply showed engine RPMS at 225 rpms idling and in gear, which I'm positive it was not idling that low unless it set when engine died. Next code was IDLE MAP STR. Engine has new map sensor from whipple when having ecm reflashed at beginning of season. Another code is OVERSPEED. set while cruising at 3400 rpms. Cand get rest of data display whenI get home. Any help to understand trouble codes would be greatly appreciated.

Dustin