port head hot and starboard cold

[Maritime 20]

1996 evinrude 115. I have replaced water pump and put in new thermostat on port side. I ran motor without thermostat and cover and verified water flow to thermostat housing. I also ran motor with thermostat out and cover on which solved the heating problem on the port side but the starboard side heated up quickly. Any help would be greatly appreciated.

 

[tashasdaddy]

Re: port head hot and starboard cold

could be recirc values have slipped.

 

[Maritime 20]

Re: port head hot and starboard cold

I meant to include that I am testing in a tub and on muffs. I just tested again in the tub without the thermostat on the port and the thermostat in on the starboard and it ran fine without overheating either side. I would love to go fishing with the kids this weekend.

 

[Maritime 20]

Re: port head hot and starboard cold

thanks chief, where would I find the recirc values? I just took the new thermostat out and tested it in a pot of water. I don't have a way to test the temp of the water but only seemed to open right before boiling. is buying a bad "new" thermostat common?

 

[ezeke]

Re: port head hot and starboard cold

Run both sides the same; you will foul the plugs without thermostats and it is not good for the engine, but short-term use would do little if any harm. I would recommend that you replace both thermoststs as soon as possible and check the seats.

 

[Maritime 20]

Re: port head hot and starboard cold

You mentioned "recirc values". What are they and where can I find them.

If the starboard side thermostat was stuck open would this be a cause to the problem I mentioned. Thanks

 

[ezeke]

Re: port head hot and starboard cold

If the thermostat is stuck open the cylinders on that side will run cold.

The water runs through the engine first; the thermostat cuts it on and off as the temperature indicates a need. The danger is when they stick closed and don't allow the water to flow through the engine.