To determine the age of your Nissan 40 hp NS40C engine, you can check the serial number, which often indicates the manufacturing year. The model number you provided, NS40C, suggests it was produced in the late 1980s to early 1990s, as Nissan outboard motors were commonly produced during that period. You might also find more specific information in the engine's user manual or by contacting a Nissan marine dealer.
1980?
1989
The Nissan NS40C 361A-1 69648 outboard motor was produced in the early 1990s. Specifically, the "361A" designation indicates it is part of the 40-horsepower model series, which was commonly manufactured during that time. To determine the exact year, you may need to refer to the specific serial number or consult Nissan's records for more precise information.