That's 1991 or 1992, depending on the serial number. Not to worry, though..it isn't important.
At www.searspartsdirect.com, you can enter the model number and see exploded parts diagrams for your outboard. Sears will have most parts available for it, too.
US marine bought Chrysler,Force was Force based on the Chrysler design but later under Mercs umbrella "Brunswick?).Shared some merc parts in later years. Depending on the year they are more closley related to the Chrysler design.