This weekend I finally swapped out my aluminum prop for a new stainless Reliance 17P. I have the Yamaha F200 HP 4 STROKE 2.8L 4 Cylinder 25 IN. We have a 22ft SSRFBXP with the SPS hull. At speed the the engine runs smooth as silk and I seem to really be getting a sense of a lot more torque. There seems to be a new shimmy or vibration when at idle in gear both forward and reverse not evident with the aluminum prop. The top speed seems to have also diminished with the stainless propeller. Unfortunately, I do not recall my RPM's and I wish I would have done a better job of before and after data. From what I recall, I was hitting on GPS around 37.5MPH with 4 people and half fuel with trim adjusted. With similar fuel and passengers the stainless lost about 2MPH. Engine is mounted in the top hole. Any feedback appreciated.