I'm looking at a 2006 185 Sport with 37 hours that a couple is selling here in the Dallas area. The boat was winterized last year and whenI asked if they had it summerized this year they told me all that was need was to put it in water and let it run to flush out all the antifreeze. Does this sound right for a 4.3l that was winterized in Texas? I thought there were plugs that should have been removed? The boat is in great shape but I sure don't want to buy something thats going to break 10 hours into owner ship if I can avoid it. Thanks!