The shaft that the blades pivot on is the monel pin and I'm assuming you craked the hub right at the hole where the cotter pin goes. I have a 1981, #311 and I had/have the same problem. I talked to the folks at Martec and they do not re-weld the hub at this location and you will need to replace it. You have two options; Martec will sell you a new hub and "fit" it to your old blades including new monel pin, balancing etc. for about $320-$350 (about half their listed price for a complete new prop) or you can buy a new one from either Defender or Pyacht. I just ordered a complete new prop from Defender for $455 and a new Martec zinc for $11. Hope this helps!
Steve Sullivan
Temptation, #311
