During my haul out in the spring of 2007, I took my prop to Troy. He suggested adding additional pitch. I was on a tight time table to go back into the water as most haul out are. Troy was great and very accommodating of my time constraints. He took a great amount of time explaining to me how diameter, pitch, number of blades and skew all work together to get the best performance for your boat. To accommodate my time constraints, we modified the existing prop to get the rpms at wide open throttle correct. The performance was improved.

However I was still convinced I did not have the correct size prop. So I took running data at every hundred rpm from idle to wide open throttle with the modified prop. I sent this to Troy in the early spring of 2008. Troy then ran the numbers and suggested a 42”d x 30.5”p 5 blade prop. I knew a 42”d would fit because that was the diameter of the original prop delivered with the boat before it was cut down during commissioning. The more I thought about what Troy was proposing, the more convinced I became that we were going in the right direction. I ordered the new prop and was astounded at the results! Not only was I amazed with the performance and speed, but also with fuel economy. Thanks to Troy this new prop not only gave me better performance but will pay for itself quickly in fuel savings.

Working with Troy was a pleasure. Not only did he figure out the correct prop for my boat, but he also suggested a marina for quick haul out and delivered the new prop directly to me at the marina yard. Thanks Troy for all your help!

Don Bitting

In the chart below you will find the background information for various prop sizes trying to get it right: