I currently have a 2007 Stratos 486sf which is their fish and ski I have a Yamaha 150 powering the boat with a 21 pitch Mercury trophy plus prop I get 55 miles an hour GPS but it is running a four bladed prop and I'm getting a lot of wash out the back because it's not the proper diameter I would like to go to a Yamaha version of a Mercury Tempest three bladed I'm interested in more top-end any suggestions thanks. Also forgot to mention I am turning 5800 RPMs wide open throttle