Hi Greg, I just bought our first boat. A 2002 190 LS. Mine has the 5.0GL Volvo engine and the prop on it is an aluminum 22 pitch 3 blade. Top end WOT is running 52 on the speedometer, I haven't checked against the GPS yet. That is putting my RPMS right at 4,500 for the short time I had it there. If you find out what was on it from the factory let me know I haven't been able to find that anywhere yet.