We have one on our 37c and I love it. Boat speed is up 1+ under power and some under sail compared to the Campbell Sailer 3 blade that I took off. Our boat is heavier than yours at 20,000# and we have a 2.46:1 tranny. Having said that, ask Kiwi to size one for you. Kiwi told me that a 17" unit would fit, but I didn't believe them and bought a 16. They were right, I was wrong. Blades are waaay aft and distance to hull much greater with Kiwi.