Running hot 470's on 77 Searay 240 Sundancer

[Loyd Dinneen]

Just finially got the boat in the water after working on her for the last 9 months and the starboard engine is over heating and the port running a little warm. I have replaced both water pumps on the outdrives and they were pumping fine on the muffs and ran only a little warm on the starboard side and a little over the middle on the port side. I have read a little on this so the first thing I'm going to do is replace the closed coolant reserivor caps as they feel like their not seating tight. The next thing I'm going to do is check and make sure I haven't kinked the water inlet hoses when I reinstalled the outdrives. Then the thermostats and then the heat exchanger. Is there anything else I should be looking for? The coolant doesn't overrun into the reservoir as it would if the coolant was overheating.
Starboard engine does seem to run a little rough when idling and smooths out a bit after it warms up.

 

[NorCal Boater]

Make sure those heat exchangers are nor corroded and plugged. Also, what about the engine recirculating pumps?
Shawn

 

[Loyd Dinneen]

That's other areas that I will have to investigate and have looked up the procedure to clean out the exchangers and replace the pumps. My engines have the rectifier charging system and the pumps are very hard to get to almost have to pull the engine. I will also do a compression test on the starboard engine to make sure the head gasket is good. Looks like I will have to pull the boat from the lake to do all this. I can still run one one engine if I want to go fishing the port runs ok and doesn't overheat just slow going, just can't go far. I also have a small leak somewhere that I need to find, just really hard to see down in there.