Posts: 3504
Location: Elk River, Minnesota | Hiya,
As hard as it is to actually view the ongoings of the water when the boat passes over, the boat essentially makes a "hole" in the water. As soon as the boat passes over, the hole begins to fill, therefore, when you raise your motor up so the anti-ventilation plate is even or slightly above the water level back there, your prop will still be fully submerged.
If you are staying with an aluminum prop, I still would say go up all the way and try it there...each hole on the motor is about 3/4" so going up to the top hole is only 2-1/4 inches. The standard yamaha prop is a great design, and although many would say not to go to the top hole, I'll bet you can get there and not see any huge loss in handling performance. You will find a bit of down-trim will be needed as you go into a moderate turn at speed, but I don't think you will ventilate to any extreme. Either way, moving it up is going to be a nice thing...you will get more motor out of the water, and actually, more boat out of the water as well, reducing your overall drag from bow to stern.
would love to hear how the testing goes once you have it moved up.
Steve |
