If it is a Ox66 or HDPI, I would recommend going completely through the fuel system as a precaution. Like any motor, they can pop. The good is that they run fine for a while if not properly maintained. If they are properly maintained, you'll probably get many hours out of either of them. I have a Ox66. Not knowing the maintenance history, I went completely through the fuel system including sending the injectors off for a clean and calibrate. That's when I learned 4 of my 6 injectors were running rich. While better than lean, the motor wasn't finely tuned. Once I finished everything, it ran a ton better. Mind you, it wasn't running badly when I got it, but I wanted the piece of mind that everything was right.
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