Posts: 3480
Location: Elk River, Minnesota | Hi Mike,
Not sure what happened to my other post, but given your information, I have no doubt that it is a combination of over-pitched and too low on the transom. Not sure if the tiller model is the same design in the rear as the console model, but if it is, you can raise the motor all the way to the top and be just fine without any huge loss in water pressure. From what I recall seeing on TJ's boat last August at Vermillion it had a setback built in to the hull which allows for higher motor height.
But...seeing as though you are at 5100 rpms with a max of 5750 on that motor, it will be more than just lifting the motor. Going all the way up will gain you roughly 300 rpms, but a change to a 19 pitch 4-blade will get you close I believe. The 2" less in pitch will be right around 400 or so more RPM's, which will also help your holeshot tremendously. When you consider what you found in the prop selector, notice that the selector shows the 13-3/4 x 19 for two things: Acceleration and top speed....
I would get a handful of 4 bladed props and head to the lake for some testing....I'd start with the 19 pitch Trophy plus if you are looking for a 4 blade...but...if you decide to try a 3 blade a Tempest in a 21 pitch should be close as well. I have heard many good things about the tempest prop...grabs well and good top end. For your rig, that might be a good trade-off and still give you good stern lift as well.
Steve |
