Generally, Mercury and Yamaha props are interchangeable, but Johnson/Evinrude are different than Merc/Yammi. You can re-hub some props (Michigan and Solas, for example) for different fitments. The hub kits are around $20-30. So if you find deal on a nice set of stainless Michigan props with Yamaha hubs, you can change them over to Johnson/Evinrude for about $20 each. Not so with all props, so check carefully and good luck!