How do you change coolant on Honda 1800C?

To change the coolant on a Honda 1800C, start by ensuring the engine is cool and then locate the radiator drain plug, usually at the bottom of the radiator. Place a drain pan underneath, remove the plug, and let the old coolant flow out completely. Once drained, replace the drain plug, refill the radiator with fresh coolant through the filler neck, and also top off the reservoir if needed. Finally, run the engine briefly to allow the coolant to circulate, check for leaks, and ensure the coolant level is correct.