I bought this motor used from a good dealer. 2013 Mercury 4HP. It runs perfect. The problem is it locks up when I pull start it. Talked to the dealer and he said there is a hydra lock or something and I should pull the cord slowly full cycle than start it normal.. Well sometimes it works fine but a lot of the time the lock stops the cord short even after I have cycled it through. Than It takes a LOT of short pulls and the motor has actually started on a slow pull or even a short pull. If I pull the cord slowly it doesn't lock up. I'd have to say 70% of the time it causes me problems.. Other times it's perfect. The dealer is a ways away from me so before I drive back there does anyone have any suggestions.