Kozzy, before you change props (and 19" should be fine based on your 4,900 rpms), load the boat up the way you're going to use it most of the time. If you end being a little heavier, that may very well take care of the RPM issue. All things considered, I'd rather be a little higher with the revs than lower - you can always control your revs with the throttle/trim. In other words, the 17" might be just right once you get a normal load in the boat.
As Henry said, check the prop matrix on SR's site - even if it's for a different year. Just double check that the drive ratio for that year matches your drive.
As Henry said, check the prop matrix on SR's site - even if it's for a different year. Just double check that the drive ratio for that year matches your drive.