Islander 191 steering cable

[Crazy Eddy]

Has anyone replaced the steering rack system on a 191 with an I/O and know what the cable length is or rack kit #?

 

 My steering has a lot of free play, I think do to trolling with auto pilot and constant coarse corrections.I have already checked the nut at rack end of cable and it seems to be tight. So I'm guessing cogs are worn and with the age of boat its good idea to change the whole rack system.