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To wrap this up and as a final update, it was written up as a dusted engine due to failure (leakage) of an induction hose. It took 60 days to diagnose and get that claim approved. After another 14 days, the dealer rec'd the wrong engine. When they went to order a 2nd time, the engine was on...

My understanding it would as the delivery valve is adjusted by rotating the base nut/fitting that the injector line screws on to. This nut/fitting has a tendency to rotate when tightening or loosening the injector line if you don't use a second wrench to keep it stationary. I hope that make...

As I understand the injector line is attached to a fitting on the pump and you're supposed to hold the fitting with one wrench while you loosen the injector line. I'm told if you just try to loosen the injector line, you may also inadvertently turn the whole fitting (and that would throw off...

I'm probably not qualified to give you a definitive answer, but I believe it does not have an ECM. I understand the fuel pump is timed to engine (cam) and said timing can be adjusted on the fuel pump's delivery valves which are essentially right on the pumps output of each injector line. It...

Update: I'm disturbed alright. They've now scheduled the factory Kubota tech to come and work on it. Apparently, the soonest he could come is another 13 days from when the fuel components had checked out ok. Add it all up - That will be day 50 from the time that I "got in line" to get the...

Update: So the Kubota processing center in NC fully tested my injectors and fuel pump and reported the work perfectly fine. Arg! I expect that Kubota will now want to break the engine down. Prior to the test results of the fuel system, I was informed that Kubota has known overfueling to bend...

UPDATE: Dealer called this AM after discussing with Kubota warranty administrator. Admin claimed that the reason the previous warranty tech requested the tear down was that they've known over fueling to cause a connecting rod to bend. Should they have found a bent rod, they then would have...

@TX Jim - Thanks, That's what I figured. Also, what would the cyl head valve clearance tell us, and with a compression of 475# do you think that should still be checked? @Kuboman - a bad injector can cause bad rings and scored cylinder? Can you or someone explain?

UPDATE: I was able to get the compression data from the dealer as follows: 475, 500, 505, 500. I'm probably going to ask them replace the injector before pulling the engine and breaking it down. At 475 psi I cant understand how that cylinder wouldn't be firing fine unless the injector...

So, my barely 1 yr old Kubota M7040 starts putting out blue smoke when running at any RPM, otherwise it starts and seems fine. I change all the filters including both air filters and fuel filter. A little better maybe, but not much. Take it to dealer and they reported unburned fuel was going...