My 2022 zxr21 ran low 70s when I first got it. The only difference is that I changed out to lithium batteries. Now running 64 tournament ready 2 people. I can get to 70 by myself and low fuel, but thats not what I bought. Do i need a different prop? do I need mine worked? Or do I need to buy a different boat. Love my bug, but cant stand looking at the ass end of a ranger