One other item to add to my list of questions. I know for a fact that the cooling system is working as far as the water pump, thermostat and fan. But what is the best way to flush out the system before adding new coolant? Thanks for any advise.

 

Just drain it out and I use CLR as a coolant flush. Add a few ounces of CLR and heat up the quad, drain it once or twice with water then add the new coolant.

 

Great idea! Thanks