The manual says to remove the six drain plugs for winterization. I have found all the plugs but the fuel cooler drain plug down near the oil pan on the port side is impossible to get to. I did drain a good amount of water from all the other plugs. Is that plug necessary to remove for winter draining? Also the manual says to fill the engine with antifreeze. I cant find the thermostat to pour in antifreeze. Is there another location on top the motor I can pour it in? Thanks... Painfully learning as I go.