I have a Motor Guide Pro Series 6700 on my 17 ft Lund.Lately I have noticed a whining noise coming from the Lower Unit area and I think changing the prop might help. It's nicked up pretty good.I have a 3 blade MG Machete now and was thinking about going with the 2 blade. I hear they are quieter . If this doesn't help I will take it to a shop. I only fish Kentucky Lake so I don't need a weed chopper. Has anybody else experienced this? What are your opinions of a 2 blade vs a 3 blade prop? Thanks for any help.