The Yamaha prop is a semi cleaver with 4 degrees rake. Rake gives you bow lift. Try a PowerTech SRD, it has 20 degrees rake. That will help to raise the bow when loaded using rake. The Yamaha is a 10 3/8 inch diameter prop, the SRD is an 11.25" diameter. The SRD will run about 1.5" higher on the boat than the Yamaha. The added blade area of the SRD helps the prop carry a load very well. I sold all 3 of my Yamaha props and bought 2 new SRD's. I run a lower pitch in the marsh and 1" more pitch in the river. I need the hole shot in the marsh, in the river....not so much. I tested the SRD on several different boats with that 4 stroke 40/50. In every instance, it out performed the Yamaha prop on hole shot, and top end.
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