I have a Mercruiser Alpha one 3.7L motor in my boat. Model #MCM3.7L. 165HP. Engine s/n oc46584. Drive s/n oc709799. It has a sticker on the top that says the cooling system is filled with a 50/50 mixture of ethelyn glycol and water.
Today I went to winterize my boat. I put staybil in the...
