There is a select group of collectors of scale model outboard boat motors. A book has been written about them, and their are just a few websites devoted to them. Two manufacturers come to light: K & O outboard models apparently manufactured diecast and plastic boat motors from 1952 to 1962. Alterscale now produces several precision scale models of Evinrude, Johnson and Honda boat motors.
What's it worth? Take a look at this Alterscale price guide: sold listings for a value indication.