Steering wheel turning but 1150 mercury tower of power isnt

[trubornot]

Let somebody else drive the 1978 baja ss bowrider and i believe something happened at the helm with the ride guide sterring. The steering wheel turns but the motor is frozen all the way to the right (to turn boat left).
Just wondering if anybody knows any part numbers for these parts or if there is an upgrade i should just throw in. Any recommendations would be appreciated. Thx

[1954bmw]

Do you know what kind of steering this is, if it is Teleflex rack and pinion cable, there are some part numbers on the cable close to the rack end. Oops, sorry, reread the post and saw it's Ride Guide, good luck with that, looks like it's obsolete.