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Tom
I know I don't have a shear pin. I have a rubber/plastic sacrificial hub that functions like a shear pin. I was lazy in my post and didn't explain it.
I had a stainless steel prop on my 170 and hit oysters/rocks and sheared/spun the hub. Took several hours to get towed home.
Had to unload the boat. Missed a day of fishing. Fishing days are important to me because I live in Texas and the boat is in South Carolina.
I replaced the stainless steel prop with aluminum. I 've hit oysters since and have not sheared/spun the hub. I've replaced the prop but haven't missed any fishing time.
I don't have empirical evidence that one is better than the other but I'm going to stay with aluminum on my small boat. I have stainless steel props on my Grady White which is in Texas.
Thank you for your time and your support of whalercentral. We all learn a lot.
Thanks
Harvey