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.
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young rabbits are the snickers bar of the wild. Everything eats them.