I have a 2008 FX HO that I just bought with 10 hours on it. The craft runs great at 6000 rpm but overheats and shuts down at 8000rpm. it was in salt water before I bought it. It flashes code 01 when you hold the buttons for 10 seconds. I pulled the thermostat out and it overheats sooner. Any ideas where to start or what path to trouble shoot this?