"After years of trying [i]ever
"After years of trying everything and anything I just decided to ask this to the forum:
I have a pair of 6V53TI (400HP) on a Hatteras 41' fishing / SCUBA diving boat. The engines are not new (I'm not first owner) but they used to work decently some 5 years ago until they started with black smoke emissions.
After that, I've repaired each motor twice. I've changed injectors (remanufactured) three times and have had the turbos inspected, cleaned and repaired twice. No success. Black smoke is still there.
It seems the transmission works well...
Last technician who saw the engines (tech service of DD is basically non-existent here in South America) recommended me to buy "brand new, original injectors". I'm trying to do that and that's why I psoted a message on this board earlier.
I read something about black smoke on a different DD engine and everybody said it may be caused by poor air intake. I'm not sure what should I do to make sure that's not my case (I simply don't trust the technician anymore).
The engines work basically well until they run at aprox 1100 RPM. After that, I have to increase RPMs VERY little by little to avoid the smoke. It works only 1 out of 5 times but I cannot go over 2100 RPM...
Any help!
Thanks."
"After years of trying everything and anything I just decided to ask this to the forum:
I have a pair of 6V53TI (400HP) on a Hatteras 41' fishing / SCUBA diving boat. The engines are not new (I'm not first owner) but they used to work decently some 5 years ago until they started with black smoke emissions.
After that, I've repaired each motor twice. I've changed injectors (remanufactured) three times and have had the turbos inspected, cleaned and repaired twice. No success. Black smoke is still there.
It seems the transmission works well...
Last technician who saw the engines (tech service of DD is basically non-existent here in South America) recommended me to buy "brand new, original injectors". I'm trying to do that and that's why I psoted a message on this board earlier.
I read something about black smoke on a different DD engine and everybody said it may be caused by poor air intake. I'm not sure what should I do to make sure that's not my case (I simply don't trust the technician anymore).
The engines work basically well until they run at aprox 1100 RPM. After that, I have to increase RPMs VERY little by little to avoid the smoke. It works only 1 out of 5 times but I cannot go over 2100 RPM...
Any help!
Thanks."