Originally Posted by Hoohaa
The little lever feels like it's doing nothing but it does produce results up to the injection pump but I am always left wondering if it's doing much.
Am I correct in thinking that it will only pump past the injection pump to one of the injectors as the other 3 are closed.
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pump is also activated mechanically inside the engine
. This means that the pumped can be stroked depending on the position of the lob on the cam and if so, the hand lever may not actually do anything. Sometimes you have to turn the engine
over either mannually or with the starter just a little bit until the pump is no longer stroked by the lobe and then the hand lever will work. Usually when there is air in the fuel
line before the injector pump
the lever will be harder to stroke than when the fuel
lines are fully primed. i.e it gets easier once all the air is out of the fuel lines. Once you hit this point the fuel is returned through the return line to the tank(s).
As has been said before, a diesel
engine only requires fuel, air and compression
to run. So you must be missing one of these. You could have a sticky shutoff solenoid, a bad lift
pump, etc. One way to check the lift pump is to crack one of the fuel filtres and work the pump manually. You should be able to pump a nice flow out of the fuel filter
with the lift pump by hand. Tighten the filtres and crack the fuel line to the injection pump or loosen the bleeder screw if you know where it is. Pump the hand lever on the lift pump till you get a good flow of fuel and tighten the line or screw while continuing to pump the lever. Once this is done you can then start to crack the injectors one at a time while cranking the starter until the engine is running however it should not take more than 2 injectors to get the engine to run. Sometimes it will idle rough until all the injectors are bled but usually not.
From your original post regarding the engine revs my best guess would be that you have a fuel restriction problem. This could be likely caused by the shutdown solenoid. Other possible problems are screens, weak lift pump, etc. You can measure the rate of return fuel once the engine is running to determine whether there is sufficient fuel flow as per information from Perkins
. I believe someone else also posted this suggestion.
You seem to be hung up on the injection pump whichI do not believe is your problem. These pumps are usually very reliable and I would not recommended touching anything on the pump and do not remove it as they have to be expertly installed to ensure proper timing.
You will chase your tail forever unless you start from the beginning and make sure that everything is right. Good flow from lift pump and return line is not obstructed, (shut off). air flow is good, cranking speed of engine is correct. If all of these are good and you have fuel at injectors the engine should run. If not, I suggest you leave it till you can get a mechanic
to troubleshoot the problem. Also would suggest attempting to do all this with the fuel line to the lift pump placed in a 5 gallon pail or jerry can to eliminate any potential problems upstream such as Racor
filtres or plugged fuel lines from the tank. If the engine does start up with the fuel from the pail then look upstream for further problems.
By the way the injectors are opened on this engine by fuel pressure from the injector pump
. This is why the engine won't run with air in the system as the air is compressible and the pressure in the fuel line may not get high enough to open the injector. Newer style common rail injector systems work a little differently but not likely you will see many of these engines on boats for a while.