HELLO AND THANX TO ALL OF YOU WHO ANSWER SO MANY QUESTIONS; ITS BEEN A MONTH SINCE I TALKED, MY MERCURY 1000 100 HP I THOUGHT WAS A 64, FINALLY I FOUND THE SERIAL NUMBER FADED AND IN VERY SMALL NUMBERS TO FIND OUT THAT, THE 64 CARLSON BOAT I GOT HAS A 63 MERCURY MOTOR, THANX TO HELP FROM YOU...