If possible buy an auger with a replaceable tip as it's the tip that will get damaged make drilling near impossible, you can have sharp new blades but a bent tip gets you no where.
Mike
That prop should go on no problem, around here I sell aluminum props to Honda owners all the time, lots of rock here. The 40 50 and 60 hp will use the same prop, just in different pitches. We replace aluminum Honda props with Yamaha because Yamaha is easier to repair, SS props on the other hand repair very good. When in doubt look for an NMPA shop.
DB.