I don't have any experience with outboards and have a question. I'm thinking about purchasing a boat with twin 225 EFIs. I went for a sea trial and while the engines were warming up they smoked (bad in my opinion). After five minutes the smoke stop. During the sea trial the engines ran perfect. I didn't take the rpms past 5200 because of conditions. While running 3800-4000 rpms the water temp on both engines was 140 degrees, but going back to the dock at 1,200 rpms, one engine stayed at 140 and the other dropped to 120. I was thinking a thermostat problem, any suggestions? Is the smoking went cold normal (the smoke is enough to offend others if they are on their boats)?
