C3 Replacement Blade 10-1/8 x 15 101/815C Generally used on mid-range horsepower motors (approximatey 70 Hp and less). The diameter of this blade does not often work well with outboard motors made by Johnson / Evinrude though. These blades are used with C-style propeller hubs. If you are not sure if this blade is appropriate for your use, please contact us for a recommendation.