Proper prop.
Dear Tony: Thank you for your letter. With the combination of vessel and motor you stated the recommended two blade is a 17” x 13” and a 17” x 12” three blade, both equipped on a 1” shaft. I’m not sure why your particular vessel is equipped with a 17” x 15” two blade. Before going out and purchasing a three blade you should discuss the current pitch with your prop person. You may have a reduction gear, which may be different, then the spec. unit being called out by Hunter, which would account for the difference between my recommendation and your installed prop. It would be my guess that your inefficiencies are caused by either to much load being created by the current pitch or the fact its just a two blade. By converting to a three blade, you should increase the motoring efficiency by apx. 30%+. This will help to maintain your vessels forward speed when confronted with heavy winds or seas. The current vibrations being created by the current two blade, will also be drastically reduced when a three blade is used. Hope this helps. Sincerely, Kevin L. Woody
