I bought a sunbird boat It had not been winterized in va., I checked it out when I got home it had the back freeze plug out the 2nd one 1/2 out the 3rd one was fine. I replaced them then let It run for a while it had no water in the oil. The next week me and my wife and kids exited to take our first boat out I let it run while they got ready then there was water in the oil what should I check the water jackets look fine .PLEASE HELP.
