Just wondering how to chenge the impeller on this boat I just recently purchased. And yes, I am new to this and I know this is probably for most of you a dumb question. I know on some outdrives there is something like an access cover to change it out easily. I'm figuring that I'm not that lucky. Thanks for any help. I have a 1984 Thompson boat with a 3.0 OMC and a stringer type outdrive.