Re: thermostat
What engine are you talking about? Give us the model number and maker.
Modern outboards are designed to run at higher temperatures than the water ever gets even in Florida. As a rule, you need the thermostat(s) to let the engine run at the proper operating temperature.
But, without know what engine you have, there's no way to tell what might happen if you don't have thermostats.
We can help, but you have to give us something to work with.