I will be taking delivery of a 2020 Robalo R200 in the next week. I ordered the boat with a 200HP Mercury Four Stroke as it has better performance stats than the Yamaha and I have had very good luck with Mercury motors in the past. The one drawback to the Mercury motor vs the Yamaha is that it only comes with the standard aluminium prop. I plan to purchase a stainless steel prop to install when the boat arrives and have been looking at the Mercury Enertia prop, but have been informed that the Quicksilver Q3 is the same prop and costs less than the Enertia. Does anyone know if the Q3 is made of the same X7 alloy that the Enertia is made of??Also, has anyone had any experience with the Enertia ECO on a 20-21 ft center console boat. I have been told that the ECO would be overkill on a boat that size? Any information you can provide would be appreciated as I would not mind taking advantage of the fuel economy that the ECO is known for... Note: Mercury tested the 200HP Four Stroke on the R200 with an 19" Enertia prop. The boat had a WOT of 52.5 MPH at 5734 RPM.Thanks!