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I can't answer your questions on the electronics. But if the machine was in a flood, I would be pretty sure the electronics will have problems. First of all don't use starting fluid to try to start the engine. That's a good way to break rings and piston lands. When you try to start, are you...

Regarding item 2, many new tractors have plastic and do not have a conductive filler opening on them. Case in point, our NH TD95D. So there's no metalic place to hold the filler nozzle. Not a big issue for diesel which has a relatively high flash point. Since most newer tractors are diesel...

What does your owner's manual say? That's what you need to use.

Yes, the chasis ground

Check the ground cable where it attaches to the tractor. Make sure it is "tight and bright". Make sure the wiring to the starter solenoid i isn't loose at the starter. It could also be a bad starter switch.

Does your pump have an internal screen? Is there a screw on top of a dome like piece? Unscrew and remove that and check for a screen that's clogged. Otherwise I'd replace the lift pump.

"Of course, you'll want to drain the coolant before you do this."

To remove a pressed in core plug, take a punch and hammer and hit the plug along the left or right edge of the plug. This will generally "spin" the plug so that it is on edge relative to the hole. Remove it with a pair of pliers. Of course, you'll want to drain the coolant before you do this. My...

I would worry about that much. Drain some liquid out of your filter and/or water separator into a clear jar, let it set for a while and look for a layer of water on the bottom of the jar.

+1 You should not have intermittent flow from the lift pump.

It sounds like you are doing everything you can on the tractor fuel system. What about your fuel storage? How about your supplier? Using straight #1, I'd question if it has an additive package like over the road diesel has.

The principles of maintaining good fuel quality are the same if you are storing 5 gallons or 5000 gallons, i.e. minimize condensation and treat your fuel in storage. It's only a matter of scale. Most of us are only familiar with dealing with gasoline fuel in our cars where we don't have many...

DOWfuel_training.pdf (hpcdfuel.com) The growth in non-traditional tractor use, especially in low horsepower tractors (SCUT, and CUT) has a lot of new owners buying equipment without knowing about the storage issues of diesel fuel and the potential issues that can affect their tractor operations...

If there is an upstream restriction I would expect there to be little fuel for the lift pump to move. I wouldn't declare the lift pump as the culprit just yet. If there is full fuel flow upstream of the lift pump then I would agree.

You may have to look further if changing the fuel filter doesn't cure the problem. It could be restricted fuel delivery from other than a blocked fuel filter. It could be a restriction somewhere in the fuel delivery system so start at the connection to the injector pump and work towards the...

That how I would do it. If you get a gush of fuel, then the problem is not likely to be in that part of the fuel delivery system. If you have a lift pump then you'll want to activate it by turning on the key and attempting to crank the engine. If you don't get a gush of fuel, then you have to...

I'm not familiar with all the fuel deliver systems that Kubota has but that's the general order of diesel engine fuel delivery systems.

Did you check the fuel supply circuit from the main injector pump back to the tank? There are lots of places for fuel restrictions like the filter head (which supplies fuel to the filter), fuel lines, etc. That's why checking at the injector pump inlet is the place to start. If you don't have...

Sounds like you may have restricted fuel delivery. Start at the line that delivers fuel to the injection pump (or the high pressure pump) and work back toward the tank. You should have gushing fuel flow through the lines at every point in the fuel circuit. When is the last time you changed the...