In a QSB, but probably all the HP common rail engines are similar. The Dodge truck people seem to think that 100,000 miles or so is time to replace. That is around 2000 hours. I've had a couple of other (boat) owners state that they replace them somewhere around there and feel that it makes the engine run a bit better. Bought new from Cummins they are very expensive, but reconditioned somewhat less so.
My engine seems to run well enough, no hard starting, idles well, but does seem to have the occasional miss at cruising rpm. This has not changed from when I bought the boat at 1000 hours engine time until now at 2500. I guess a $300 session with the Cummins computer might tell if this is really happening or just my imagination.
How ofter are you owners with a QSB or QSC changing injectors?
My engine seems to run well enough, no hard starting, idles well, but does seem to have the occasional miss at cruising rpm. This has not changed from when I bought the boat at 1000 hours engine time until now at 2500. I guess a $300 session with the Cummins computer might tell if this is really happening or just my imagination.
How ofter are you owners with a QSB or QSC changing injectors?
