I have stick steer and really like it. Your boat with a 25 would be just right for that. On your restricted lakes it wouldn't be a great big deal to disconnect and remove the 25 and install the 9.9 if you fished them enough. I wouldn't want to do it often but is doable. If you could get that motor for say 350.00 and spend a few more on it you would have a good motor worth the money. Those were some tough,really good motors. Almost never break and simple to work on. If you got the serial number go to IBoats and look up your parts break down. It will show you what is avaliable and cost. That way you can figure in your total cost if you decide to buy. If you can do the work fine, if not then you would need to factor in labor cost also. Good luck.
Proud Member of Team Geezer
Charlie Weaver USN/ENC 1965-1979