My warning beep problem has been solved.The code scan showed that the trany oil cooler pressure sensor was bad,thet replaced it,no fix.They found that a shift cable bracket was rubbing on the engine wire harness,checked that out no fix.They then called Merc. tech support and they said to do a check on the ECM.The boat was also stalling when you pulled the throttle back to the neutral lock position,so they were looking at the TPS and the IAC,but it ended up being the ECM was causing all the problems with the beeps and the stalling.Changed out the ECM and now all is good.I'm glad it happened while still under warranty cause they said the ECM is about $1,100.00.Props to Ron the service mgr.at my dealer for figuring this one out ,he said it was one of the most confusing problems he has encountered.
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