Any diesel engine
would require that the fuel
line feeds to the injectors would have to be removed or at least loosened to crack the injectors themselves or you would damage the steel fuel
lines. So I assume that he cracked the fuel lines above the injectors themselves. How many fuel lines did he have to crack before the engine shut down as normally they will run on less than all cylinders though be very rough?
Engine runaway or run on is usually due to a plugged crankcase ventilation system which will result in pressure in the crankcase and drive engine oil
past the rings into the combustion chamber. Also, black smoke and fuel in the exhaust
is usually a result of a high fuel content in the fuel/air mixture which can sometimes result from plugged air filters or from a faulty injector pump
which is improperly timed.
Normally these engines have a shutdown solenoid which requires activation (power on) to cut off the fuel flow from the lift
pump to the injector pump
. this is how my 4 cylinder perkins
engine in our CT 43 Mermaid in cuba
is set up. Our 6 cylinder M 135 Perkins on our CT 56 is the same and this is a 1999 model. Some engines have mechanical activated fuel shut offs and most newer non marine
engines have electrically operated fuel solenoids which require power to be removed to shut down the engine.
I think you may be experiencing more than 1 problem at a time in this situation. Black fuel could be as a result of a biological condition, breakdown of the fuel lines themselves or just plain dirty fuel from the supplier. When we were in Indonesia
last year we had to clean our racor's weekly to empty the sediment from the bowls which was just carbon particles. the fuel was black right out of the barge but it was the only fuel available.
I had a mentor who's favourite saying was "keep it simple stupid" and he was right 99.9% of the time. I believe that your runaway engine is a result of a faulty injector pump combined with a problem with the fuel shut off. Just to be sure, I would perform a compression
test on the cylinders just to make sure that I was not going to waste a lot of money
on an engine that was worn out and if results were within acceptable parameters then I would pull the injector pump and have it rebuilt and replaced by a professional to ensure that the timing was correct. I would also replace or prove the shutdown solenoid as if this is working properly then even if the injector pump is faulty it should shutdown the engine by cutting off the fuel source. As an injector pump would normally be rebuilt or replaced along with an engine rebuild
this will not be a waste of money
It might be possible for oil to get into the fuel system through the lift
pump but I have my doubts. This is cheap
to replace as well though.
Good luck and keep us posted.
I would not trade
our heavy displacement
"leaky teaky" for the world. Well, maybe for the Whole World.