C-25 outboard on port side
The primary reason that an outboard of the roughly five to fifteen horsepower size that is normally placed onto a bracket on the transom of a C-25 is placed onto the port side of the transom is because the tiller that nearly all these engines have is on the engine’s port side. Were the engines to be placed onto the starboard side, these tillers when moved to turn the boat right or to starboard would possibly bump into the top of the rudder and limit the turning of the engine. Note that as this is performed, the rudder itself is pivoting its rear towards the engine and hence is coming closer to the engine tiller as well.Therefore, the engine is placed onto the port side.Most likely the C-25 that you are looking at will have at least an engine bracket, and possibly outboard, mounted on the port side. However, this boat may not have ever had an engine, much less engine bracket installed. If such is the case, then your next question will be were to mount the engine bracket, preferably on the port side, for which the best answer will come from the link that Stu graciously provided.Nevertheless, the C-25 may possibly have its engine mount on the starboard side. In that particular instance, I would inquire of the owner why that is the case, such as the possibility of the tiller on the engine being removed and a device connecting the engine to the rudder employed in its place. In addition, if such specific cause were the reason for the engine on the starboard side, I would definitely see if that engine and device could be sold with the vessel as well.I do know that at least some Yamaha engines have their tiller placed more amidships than to port as other engines. As such, these may be successfully used on the starboard side of a C-25, although I have never seen this performed.BTW, if you think that a left handed person has an easier time handling an outboard tiller than a right handed person, well being left handed, I can tell you that such cannot be the case.