Ok, I've got an Evinrude 4 HP Deluxe, model E4RDHETB, and have a question. Is there a thermostat on this engine? It's on a 14' v-hull. I want to do a 3 day trip out of Flamingo with it, and hopefully, won't have any surprises. I changed the plugs, lower unit oil, and she runs pretty good. What...