I am trying to determine if my motor does in fact have a maintenance port that can be used to fog both carbs at the same time. I found a box with a red quarter turn switch on it and three lines coming from it. Is this it? Is there any reason I should pay to have the motor flushed with antifreeze and the lower unit wrapped from the dealer? I want to do it right but as we all know saving money is on everyone's priority list too. Thank you very much.