Hello caseitman welcome to YT! You have given no indication of the amount of fuel you get out of the line from the tank. That tractor also has a fuel supply pump that originally had a sediment strainer on top. I believe in many replacement pumps that was eliminated. Bottom line is you give no indication of what type of flow that pump is providing. It could be inoperative, it may have failed in a way that introduces air into the fuel stream. This problem may be hidden by the fact that the supply pump is leaking fuel into the crankcase through its mounting area to the engine. The injection pump has the ability to draw fuel to itself but these systems are designed to supply the pump, rather than the pump drawing fuel through the filters. You mention opening the banjo bolts on the injection lines at the pump I suppose you know to properly bleed the injector lines you need to loosen the lines at the injectors. Catguy is not real clear in his description of the problem he has mentioned, bottom line is if you actually have a newly rebuild injection pump this should not be your problem. If you did for some reason use the return line fitting out of the old pump it could be a problem. Governor weight flex ring deterioration is a problem in Roosamaster IJ pumps. After time, heat age and exposure to fuel they become brittle and start breaking apart. The link shows an example of one being installed. The pieces of the ring float out and plug the return check valve fitting. When this happens the housing pressure rises and then the main high pressure fuel plungers cannot pump fuel. The diagnosis check for this is to loosen the two screws of the timing window cover just enough to relieve the pressure in the housing and the engine should return to normal. Also usually when the engine dies due to this problem the housing pressure drops and the engine will restart but then the RPMs slow as the pressure builds up again. This is where part of what cat guy mentioned comes into play. As a ..cheat fix.. the check ball can be knock out of the fitting which allows the pieces to just flow out into the return. The engine will then run somewhat normally depending where other pieces of the ring may go in the pump to affect the operation of other mechanisms. As I said a newly rebuilt pump using the return check fitting supplied with it should have no issues like this. However, if the pump was rebuilt a couple years ago and has been setting who knows, I am only saying this in case the pump came with the tractor. I do agree with the fact that the engine should fire on starting fluid unless you are not using enough.
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