Hello MartiPop,
If you went to a Hydraulic steering system like a Baystar or Seastar you would honestly never want another mechanical steering system again. I have a Seastar on my 22-2 with twin 115's and a Baystar on my flats boat with a 60 Bigfoot Merc. The Baystar is a lower cost version rated to 150 hp which would work for your Suzi 140. You are going to spend about 2X over a mechanical system and worth every penny. Teleflex is the manufacturer.