I did mine last year at a cost of about $350. This was the price of a new brass shaft (including machining the flange, threads and key stock slots) and balancing and truing the prop. Here's the step by step. THE OUTS: 1) Seperate the engine flange from the shaft flange. 2) If you can remove the flange from the shaft with spacers do so. If not use a hack saw to cut the old shaft about 2 inches from the shaft flange. (SAVE THE PEICES) 3) With the flange off slide the shaft back (oyut the stern) though the stuffing box and cutlass bearing. 4) Drop the rudder 5) Take the shaft parts (or the whole shaft if you got the flange off) to your marine shop. They will pull the prop off. The will match the length and reset the flange. It is important that they balance the flage at the end of the shaft. If you can get the prop off easily do do otherwise let them use a press to pull it off. The shop will also balance the prop at the end of the shaft Save you from damaging the prop. THE INS: 6) As long as you have the shaft out replace the cutlass bearing. 7) From outside the boat slide the shaft in through the cutlass bearing and through the stuffing box. 8)Put the flange on the shaft (USE ANTI SEIZE COMPOUNT) and secure the flange bolts to the shaft. Remember to put the retaining wire back on. 9) Align the engine 10) Bolt the engine and shaft flange together. 11) Put prop on. You can but the prop on before insering the shaft. It does make it easier to turn. 12) If you use a flex couple you may have to shorten the shaft to assure that the prop clears the rudder. It took 1 day to take it off (3 hours) and 3 hour to put back on. On the second try I bet i do do it in a total of 4 hours. $900 sounds about right for a yard to do the work. I did it myself because of a limited pocketbook. Hope this helps?? Let us know how you made out. Nelsonhow@aol.com