We picked the boat up, took it to the lake and noticed a small vibration riding around. Then we filled the ballast bags up to surf and the vibration was terrible. We packed the boat up and took it back to the dealer. The dealer said it was the prop. Here's the rub:

It wasn't vibrating before we took it to the dealer but it was after we picked it up. We didn't hit anything because the vibration started right after we received back from dealer. The only thing I can think of is the tech might have hit something. They wanted $130 for diagnosis fee. What would you do?