Engine gets hot at idle

[Dannyboy1966]

At temps over 65, when I'm sitting idling for a few minutes my temp climbs to almost 230, once I start moving again it goes right back down. I've checked my fan clutch, when I give it a good spin by hand, it doesn't go more than 1/4 turn more when the engine is outside temp (cold). I changed the thermostat last fall, and put in a 195, because it was doing this same stuff then. but over the winter didn't have any problems because it was cold outside. It has the original factory radiator in it, I'v looked down in the fill cap, it looks clean on that end, but could it be plugged up on the other end where the water returns from the engine? Or am I looking at a impeller on the water pump that is slipping? I'm fresh out of idea's guys.