Posts: 3480
Location: Elk River, Minnesota | Hiya,
I've been thinking a bit about this set up and assuming your boat alone is fairly heavy (I'm guessing around 1100 pounds or so alone?) The gear case on the motor I would say was a great idea...
with that in mind...looking at the splitfire propeller the design looks a lot like the OMC aluminum propellers, which in my humble opinion were never a great design, but served a large amount of people for overall running.
Going 4 blade I think is a great idea on this boat as well as the extra surface area of the 4th blade will definitely help keep the bow up a bit and still lift the stern and keep it on plane.
That being said, I am wondering if trying a 3 blade black max in a 15 pitch might not be a possibility. I would think they might have a few different diameter props you can try in the same pitch (not totally sure on that as it is dependent on hub size), but they do have a larger array of pitches to try as well. The black max is a bigger eared propeller, so you will still get decent bite, but more rpm without the 4th blade in the water. I'd say try a 15 pitch and a 13 pitch and see where things are from there.
When you test, keep the goal in mind to be at your max rpm with just you and your gear in the boat with about 1/2 tank of gas or so... By maxing your rpms at this load level, you have room to add people/gear without having to make a prop change.
Steve
Edited by VMS 9/13/2017 10:03 AM
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