i have a problem with my 1985 omc outdrive. every now and then there's a clunk when i take off and also while at any other speed. it sounds like i hit something. one mechanic said it might be the gears in the lower unit. i'm thinking of pulling the outdrive for the winter and doing the repair myself. has anyone else had this problem, and how difficult is it to repair. would i be wise just to look for a used unit. thanks, bob