Honda BF10DK3SHS Outboard - 15" Shaft Electric Start 9.9 HP 6A Charging Silver. Overview. The BF10DK3SHS sits in Honda's 9.9 HP class, a category known for balancing usable power with portability and efficiency. It's a popular choice for boaters who want more authority than smaller portables without moving into significantly heavier mid-range motors.. This 15" shaft model is designed for short-transom boats such as aluminum fishing boats, inflatables, and utility skiffs. Electric start adds ever