Yesterday the line broke between the transom in the outdrive is there a check valve in there to stop the water from going into the outdrive I would like to know if I can block it off because I cannot get it in the shop for at least three weeks to a month in the shop we don’t do much driving with it maybe I’ll together maybe two or three hours a day I was told the check valve that will not let water get into the outdrive but I don’t understand that