I purchased this outboard in 2011 (brand new) and it has worked like a champ until tonight. We pull out of the slip and exit the harbor just fine (about a 5 minute ride) and the motor just shuts down. It took an uncharacteristically large number of pulls to start her again, and she did so only reluctantly at first and then all of a sudden it seems like the engine was able to run at high rpm in neutral but would inevitably stall with an occasional "timing is off" kind of sound, almost like a mini backfire. Also, when running in neutral and shifting into forward or reverse, the engine would immediately stall. I am baffled. Help please!