Diesel engine dies after running 2-3 Hrs.

[Newf]

Any diesel expertise on here? Asking for a guy who has a 30HP Yanmar in his 2009 Ranger Tug. He can troll for 2 -3 hours and then the engine just dies. Wait for a couple of minutes and engine fires up fine but only runs for 2-3 min and dies again. Next morning, fires up fine and can troll for another couple of hours and dies again. Any thoughts that I can pass along would be appreciated. No alarms triggered prior to engine shutting down.

Thanks

 

[Newf]

Forgot to mention that there is approx. 1000hrs on the engine.

 

[NDT]

Check fuel tank vent. If it’s plugged or partially plugged. It will pull a vacuum until it can no longer pull the fuel to the injection pump, then it will die. Usually letting it sit will give the tank time to equalize(pressure) and thus allowing the fuel to be sucked out again.

When it happens again, open the fuel tank and listen for the rush of air, then restart and see if you get more then 2-3 min of run time.

Or if it has an electric fuel shut off solenoid, the hold in windings in the solenoid could have a slight resistance causing the solenoid to heat up and fail over time. But this usual is accompanied by a blown fuse or circuit breaker trip depending on application.

 

[Newf]

(NDT) Thanks for taking the time to respond. Really appreciate it. I will pass along your comments and hopefully it will help him with his issues.