How old is Johnson motor serial j8rc1c?

The year model of a Johnson outboard engine is determined by "model number" rather than the serial number.

You need model number to determine model year.

With Johnson outboards, we cannot tell you the age from the serial number. If you tell us the HP of the engine, and it's model number (usually on the clamp bracket), then we can tell you how old it...

The year model for a Johnson outboard is determined by the "model" number, rather than the serial number.

Johnson and Evinrude outboards, use the model number, rather than the serial number, to determine the year model. Mercury outboards, uses serial number and horsepower.