Hey guys, I just tested a z7 with a 150 pro xs today. It seemed to run great but the rpm's only reached 5100 with the top speed being 51-52. it had a 24 tempest prop with no plugs. It also had a manual jackplate and I have zero experience with jackplates. There were three people and half a tank of gas with no gear in the boat. Any idea why the rpms and top speed would be low? Thanks