....... it’s going to max out at 5000rpm.......
I guess my lack of understanding is more fundamental. Why is it going to max out at 5000? If it's cavitation, wouldn't you put a higher output pump that had a higher operating range? Are gear reductions not used?
Because if the engine cannot produce any more torque than 712ft lbs over 5000 RPM, the jet has effectively "loaded out" the motor at that RPM. If it can produce more than 712ft lbs over 5000 rpm, say 862ft lbs @5500, then the jet will fully load the motor at 5500 rpm.
Oh yea, gear reductions are not desirable...they add weight and move the motor forward, throwing off the boats CG and increasing the chances of stuffing the bow into the "green room":
https://youtu.be/BM7eXZeXRJo
