"Ron, you don't have quite
"Ron, you don't have quite enough numbers there and depending on where the number is missing can make a significant difference.
The 35 Mercs were built for a while in the 60's then again from 1984 on.
If your serial starts 730... then it will be a Canadian built model (year really difficult to pin down).
Alternately, if it has an alphanumeric serial (post 86) it would be 0A.... etc (zero followed by either an A, B, C, D, G, P or T - only options)...
Or is this a "Mariner"? which could mean it's a Yamaha built model - distinctly different from the Mercs..."