Went out this past Sunday. Full fuel tank, full water tank and 3 on board. Was 4400RPM and GPS top speed of 45 mph. This was all trimmed up etc. Was cruising around 30 mph. It felt like the boat wanted to go more,but just couldn't get there. I was expecting to see something closer to 58. I know these aren't the fastest boats and they're heavy. I am going to empty the water tank and try it again with less weight to see what happens before messing with props.