Some divers will do it. The diver who changes our zincs also keeps spare max-prop parts (the special screws and cotter pins, etc). He has re-pitched our
3 blade classic in the
water without a problem. And, we are in cold
PNW waters, and he does it while wearing gloves.
When looking for a diver for this, be sure and find someone you know has done it before (personal
references, etc.). Don't just pick a diver who says "Sure, I can do it. Can't be that hard" ;-)