I have a 1990 Volvo Penta 570a and I believe my outdrive is a 290DB. I know I definately have a water leak. What is the best way to find where the leak is or where can the leak might be? thanks in advance! Also I got the prop cover out but the prop will not come out. I believe it was grease when put back in. What is the best way (tool) to get for that. Thanks again!