sounds like overheat to me, my 82 johnson did a rapid beep for overheat.
check the thermostats and popits and replace them, they are cheap.
if that engine is an 89 does it even have vro?
I can show you how to convert to electric fuel pump and you premix if it is vro or not, works much much better than the factory pumps.
lake fork FISHERMANS COVE MARINA/reservations - 903 474 7479