I have an old white Chrysler outboard probably 10 - 20 HP from the late 60's - 70's. I can't find any numbers, where do I look? There is no top cover so I don't know the HP. It has electric start and seems to be a long shaft with a huge prop for the motors size. I can send a pic or add here if there was a way. Any ideas how to figure this one out? I have a few part numbers like the starter is 510955 and it has a Magnapower III prestolite control box any ideas what I have here or where the numbers are?<br /><br />Thanks Bill