I OWN A 1999 MERCURY 150 EFI THAT I HAVE OWN SINCE IT WAS NEW. IT HAS BEEN AN AWESOME ENGINE. IT IS USED MAINLY IN SOUTH LOUISIANA IN SALT WATER IN THE WARM PART OF THE YEAR. DOWN HERE IS ABOUT 8 MONTHS OUT OF THE YEAR. WATER TEMP IS AROUND 70 TO 85 DEGREES. I HAVE BEEN AN ANTI THERMOSTAT PERSON...
