Ask hell's bay, they do lots of testing. They just went out with evinrude not too long ago and tested props for the marquesa and professional I believe.
I talked to powertech the other day about my suzuki df60. they recommended the SRD4-12 for mine. Im running the srd3-15 now. But not turning enough rpms
I would call HB, they should defiantly have the answer. If not just call over to Power Tech, they have the greatest customer service and will help you find a prop that does what you want it do to. You will want the answers to these questions handy when you speak to HB and or PT. What Model / HP Engine? What is your current Prop Pitch? Is it aluminum or SS? What are you currently getting in RPM's and MPH with a normal load of gas and gear? What are you looking for this prop to do?
