Looking at repowering my 99 Champion 193 DC. Currently have a 199 Mercury 200 EFI. I am looking at a NEW 200 pro SX. I have conflicting stories of which motor to get. I was told I needed an XL which has a 25" shaft. One dealer I talked to said he worked at Champion and he said it's a 20" shaft motor that I currently have. Any input would be greatly appreciated. TIA.