I had it on my 94 28 Skater and had no complaints and it worked fine I had it in both salt and fresh.

puder,
Oops, I misread your post and thought you were looking for one.
I'm assuming it's a K-5 cylinder with the rest of the hardware from another source. I'm not sure if it makes a difference, but I think the K-5 ram is unbalanced, meaning I think you'll have more turns lock to lock in one direction as opposed to the other. They also have a fairly large volume compared to many other rams. I would be certain the ram works OK with the pump, reservoir, and valve before buying. I've never seen a K-5 on an add on system.
Gary

I had the full manual Hynautic system on my 24 Bannna Boat and also had it on an 18' Donzi classic. Very simple system, never had any trouble with either set up. Too Old is correct, with the proper size helm unit, the # of turns lock to lock will be fine.