Welcome....
Welcome to the forum, thanks for your support!.......]
Your Utopia has the M-2 Mercury engine. These engines have a total loss water system. When you pull the engine out, all your water drains from the cooling system. But there are things you need to do for the winter months.
Unlike the Rotax engines, you'll need to dowload the M-2 manual from the library and look under storage procedures. There you'll find all the info your looking for............:cheers: