thanks Bee,
These boats typically didn't carry passengers, but if you had one, he sat on the side. The person running the boat sat on the starboard side, just in back of the rear bulkhead. This gave him easy access to the steering stick (which controlled the rudder), the flywheel was between his legs (for starting), the points were in that little brass thingy in front of the engine and you could adjust timing (speed control and transmission-forward or back), the carburetor was between the two cylinders, and the water pump was at the end of the engine. Not exactly OSHA compliant by today's standards but did give access to everything you needed to run the boat.
Jack,
Bulkheads were for organization and segregation, keeping your catch separate from the bait, crabs separate from the traps, etc. They also served as permanent jigs when building the boat. The sides were bent around the bulkheads.
While most of the putt putts were similar, you could tweak them for special jobs. In turn of the century Louisiana, there was a lot more local traffic on waterways than roads. If you needed to move livestock or something big, it was put on a barge. The vertical front transom and front posts were for barge moving. There is also a post behind the gas tank for pulling. These boats were also used for pulling a boom (raft) of floating logs to the mill