After getting a custom nosecone installed, I decided to blueprint it to improve the performance. I rounded out the tip, and redid the edges of the skeg. We gained speed, and are now hitting the rev limiter with a 28" ProMax prop, 77 MPH at 5940 RPM. We are getting 6.75 MPG at 60 MPH. And over 6 MPG at 65 MPH.
Here's the write up on what we did, and a video too. Will try a 30" ProMax, and possibly a Hydromotive Quad 4 X OT, and should be able to get 82. This is why I wish the ProXS version of this engine came with a sportmaster and 1.75:1 gears.
Article: https://www.wavetowave.com/home/2019...cation-testing
[url=https://flic.kr/p/Rvo6rZ]Allison Merc 150