Eman89so

The evinrude was a scam.. the guy busted himself on a  accident..Such as life

  That sounds like it could be quite a story. He didn't get your money did he?
 

I'd never deal with anyone in that much of a hurry.  Selling stuff is never really fun, but something as expensive as a motor needs at least to be test run (better if on the boat).  Ask for compression tests, or buy your own tester and only buy if they let you test and acceptable level.  If they have reciepts of service, even better, and likely worth a bit more.  If you get that 50 fixed, it is doing what you need it to do.  If it is getting you and your load on plane, then it is doing it's job.  I highly doubt that overloading your boat is what caused this, unless you were well over your USCG max.  I've had mine to the max on the Ohio (not dealing with Erie waves) and was on plane with the 50.  I'm guessing it is just an old prop, that has put in more than it's money's worth.  Take your time, most likely mid Summer isn't going to find you the best deals.  Come end of Summer/Fall, you should be able to find a reputable seller, that doesn't want to winterize a motor they used 1-2 times and likely not planning to use again.

Don't forget to check the prop !