On my 04 Scag Tiger Cub, yesterday I unloaded, tried to start the blades with both handles pulled in and it wanted to choke down. At first thought it need to warm up some. Put both handles out in full neutral position and blades engaged properly. Thought maybe water had gotten in one of the connections somewhere. By trial and error I unplugged the wire that goes to the park brake and everything works fine. Only problem is I have to plug it back in to start it. What could be causing this problem. It's had plenty of time to dry out from its bath on Sunday.