I owned a Hurley 20 in the mid-1970’s when living on the Isle of Wight where the Solent tides really raced. A Yamaha 8hp pushed us along very well indeed. I owned another outboard – an Ailsa Craig 4hp – and I gave that a go. It did the job but not so quickly. The much lighter weight and better fuel economy were attractive, as was the air cooling. No impellers to worry about was a bonus.