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The book I have doesn't have p/n's that high, it was published in 1997. Call Cummins, you'll need your engine s/n. A good parts guy can figure out what uses that p/n injector. Usually, marine injectors are flowed higher than automotive. Boats don't have down hill, they are constant power...

The pump returns a boat load of fuel. To see if it is an injector issue you need to see if there is flow from the injector return....the small line that is on top of all the injectors that terminates at the fuel filter inlet fitting. The injectors use every drop of fuel supplied to them, there...

Any progress?

If you checked pressures and they are where they need to be, I would pull the injectors and have them tested or just get another set. That what I would suggest if all the testing was done. If you have checked pressures, isolated the engine from the chassis, chances are injectors are messed up...

So the engine will not turn over, as in no crank after shut down? 600 is low. Look on the engine data plate, I believe idle should be 700. Checking fuel system as follows. In the picture, Restriction from the truck, yellow circle. Lift Pump output pressure, black circle. Pressure drop across...

You didn't say it would idle all day in neutral, it would idle only if you held rpm above 800. What rpm does it idle at? You need to check pressures and restriction.

Exactly....IF the trans is FUBAR, it won't. It is trying to start fully loaded. A MINIMUM of 200 RPM....per Cumins...is needed to make one lite off...it will at a lower rpm, but NOT with a load. Before you go messing with pump settings, remove the converter bolts. It is...depending on the...

Hard lines are pressure lines. If they leak, no air will be introduced into the system. You will just have a giant fuel mess.

If it runs and drives but shuts off at idle or when you come to a stop, COULD be a messed up trans/converter. If the trans or converter is f-ed up, the engine is seeing a load all the time, the trans stops turning so it kills the engine. Does it smoke on start up? Easy thing to do to eliminate...