200 hp, 2001 Ficht motor - Hit a rock in reverse. The prop wasn't spinning and water pump was not working. Removed lower unit. Lower unit is operating correctly. The top of the drive shaft that goes into the power head is missing the first 3/8 of an inch of splines. It's ground down smooth. Power head is coming off next. Does anyone have any idea what else is broken? Any input would be a big help. Thanks.