I have a KG7 and a bunch of props for it. I think the props are left hand rotation because the water pump cover is removed with a right hand rotation. I learned this many years ago when I replaced the water pump impeller and made the special Mercury tool to remove and replace the water pump cover. I ran the motor many times on my Model R Alumacraft but I can’t remember which prop was fastest. Of course that will depend on the size, weight, and hull design of your boat.
