What fluid should be used to flush an open raw water system on this engine? The manual says a 50/50 mixture of water and 'corrosion-proof glycol' such as 'Esso Cutwell 40' or Shell Donax C or equivalent. I understand I should suck the fluid up thru the inlet hose at the transom, but I can't find the recommended 'corrosion-proof glycol'. Can I use regular antifreeze/coolant? My objective is flush out any existing rust or deposits and protect from future rust/corrosion.
Thanks!
Thanks!