It was either 62-65 or 68-69 (assuming a 6 cylinder)

-W

"Sam" wrote in message
...
I have recently purchased a second hand boat fitted with a 100hp Mercury
outboard. Can someone please tell me how to find out the year the motor
was
built, as I want to purchase a manual and don't want to be stuck with one
for an incorrect year or model.
Thanks .. Sam.