Hi, Im new to boating and just purchased my first boat last year, a 1985 sunchaser trihull, OMC sterndrive.The prop is pretty beat up and im looking for a replacement and was hoping to get some quick help. The prop is 13.75x13, has a model # 763302. There are so many different props iv looked through online and I really just don't know what ones will fit or wont fit and looking for some advice. Thanks