I started the boat up yesterday, and noticed it was very difficult to shift into forward or reverse. When I push the button on the bottom to take it out of gear, the throttle moves both directions just fine and you could hear the engine revving up in both forward and reverse. When I left it in gear it was very difficult to move the throttle either direction. Also, when I put it in forward, I could hear and feel a thump coming from the engine compartment. Is this just a bad shift cable, or something else?