So, I took the boat out again over the week end. (Will it ever stop blowing down here? Sum b----!). Aneyway, I installed a 4 blade Solas prop, 14 1/4" x 17". I knew it would change the top RPM's, I had no idea how much.
The prop changed the whole characteristics of the boat.
It planned at a lower rpm, it kept the bow down more all through the rpm ranges.
It also lost 1000 rpms and 10 kts of top end speed.
Strangely enough, there was no low end prop chatter with this prop.
I will be switching back to my Yamaha 3 blade prop, and doing some further tweaking to that.
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