warning buzzer on one of my 1999 sx150try efi

when i first start motors, both motors will go threw there three beep mode .they both fire right up and run great .when i stop them and go to restart the port motor warning buzzer will beep more then the three beeps but motor starts right up and runs great .both motors have new water pumps put in at the end of last year ,the port motor had nylon bushing that was on drive shaft replace because lock up on shaft .buzzer for port motor was not working when i purchase boat .but after i changed bushing and pumps i installed buzzer.i have been running motors ever since ,they run great just want to know if i may be doing damage