Quote Originally Posted by brad460 View Post
Your engine runs hotter than 110F...so you would be putting water through the system that is colder than the engines normal operating temp..

One word: thermostat!

There is nothing in your boat that would be hurt by 110F water...
My worry is that the engine's cooling system is designed around water typically at most 20 degrees cooler and usually more than 30-40 degrees cooler. The idea is to dump a bunch of energy from the engine to the water using a heat exchanger. Cooler water makes for a less efficient heat exchanger. I guess since the engine won't be under load, it shouldn't be an issue, but wanted to see if anyone has had issues in hot water.