I believe the shift shaft is leaking. Any advice on removing the shift shaft seal? The manual references a special tool. Is there something else I can use, or a way of fabricating a tool? also, how could I fabricate a tool to remove the prop shaft (to replace seals)? Once again the manual references a special tool. Also, is there anything else I need to be wary of when replacing the seals? The motor is a 1963 Merc 1000.<br /><br />Thanks for your assistance.