Shakedown cruise result - not ready yet

So yesterday was the big day...   first time to have my boat in the water, hoping to get a good read on any little things that I needed to clean up to have this thing ready for family.   The good news is that the boat floats and starts.

the rest... well, it needs some work still

- at the ramp, the boat started, not too tricky, but it felt like it took a good while to warm up enough to get it in gear without stalling... maybe chalk this up to user inexperience.

- once running, it bogged severely when moving from idle to anything above that.   Once under load(in gear) the motor back fired a few times(thru the carb) and smelled strongly like unburned fuel.   once home, I discovered the carb idle screw on the observer side was out approx 8 turns, where the drivers side was about 2.5.    the idle smoothed out a good bit once I put the vacuum gauge on the motor and adjusted the screws for highest vacuum.   I end up with just over 14 inches of mercury as my end result.   hopefully this will help the bogging and flooding and backfiring issue on the water.   

- I had a fairly good vibration when the motor was under load, I hadn't felt it in the driveway on the hose, so this one was a bit of a surprise.    Once home again, I took a temp reading on all of the exhaust riser ports, and had 220 degrees or so on the front 2 cyls on each side, and about 200 on each of the rear cyls on the left, but only about 120 on the rear 2 cyls on the right.    Seems like the cylinders were too cold to have been firing.   I had new Autolite 764's in the glove box, so to eliminate a dead spark plug possibility, I replaced them with the new set.    I still have a strong vibration at 1800 RPM on the hose,,,   not sure what to make of that, I wonder if this has something to do with my issues under load?    what would cause this vibration?