While trolling for tuna the motor just died.6 Hrs later vessel assist puts us on the trailer at 1:30 AM. I thought it was the fuel but it seems to have fuel to the motor. While waiting for the tow, I got it to started in nuteral but could not keep it running, IT was smoking like crazy and running really ruff than dies. When i got home I changed the plugs and fuel filters but it still will not start. Any suggestions would be great. Thanks