loss of power/cavitation?

[thagannn]

im thinking i need a new wear ring... ive sucked up plenty of sand and sea weed throughout the time ive had the boat. only one year old/115 hrs. anyways it accelerates slower and top speed is 55ish when it used to be 65sih

 

[sunbaby69]

well which is it engine power loss or propulsion loss?