I'm about to bring my Tahoe Q4, 3.0 MPI mercrusier engine, down to FL and in salt water the first time. Someone told me to make sure I have a heat exchanger? I'm pretty sure it does from what I have read. Anyone else have the same boat/engine and running it in the gulf? I could use any advice. I will trailer it and keep the salt water washed off each time and flush the engine. Thanks!