I just purchased a 1988 sea ray seville 16ft with a 100hp o/b. I took it out for the 1st time the other day and it ran great. Then anchored for a few hours, tried to start it and the battery went dead. Is it possible the choke is stuck now. Put a new battery in it and it will start and idle and run at low speed but when i give it more gas it doesn't want to build speed. It also smells rich and there is more exaust. Thanks for your help.