Low speed overheat

[greenhabah]

1995 225 txrt

I overheat while *****ing at 6-700 rpm's.
Runs ok at 1200 rpm's and above. Not sure about in between.

Has not run right this season. (Did have a late start)
No problems last year.

Since last season:
New lower unit
New thermostats
2 new poppet valves (last one installed is the new rounded style)

The starboard side thermostat cover runs hot on the raised portion where the temp sensor is.
The port side runs about the same temp across the thermostat cover.

Pulled the starboard head cover and found an anode that broke free.
Yeah...."found" the problem.

Put it back together and it still overheats.

What next??????????????

I've seen other posts that were looking for a diagram of the water flow but I didn't see anyone find it. This would be helpful if anyone found this.

I assume the water splits on the way up to the 2 sides. Or does it cross over at some point?

Tell tale seems a little weak and slows down when I put it into gear.

[boats.net]

Did new gearcase have new water pump and if so is it installed properly? May have a blockage in water passages around cylinders, head covers, exhaust covers or water tube from water pump to engine.

[greenhabah]

The gearcase did come with a new water pump. I "assume" it is installed correctly.

With the gearcase off I flushed the engine and the water was strong down the water tube.

We did clear the zinc from around the starboard side cylinders.

It appears to be the starboard side overheating.

Where does the water split to go to either side?
Or does it pass from one side to the other?