JD X749 Dying after 30-45 minutes

[Mike VS]

so when it dies, can you re-start it immediately?

Yup... If you go back and read (I know it's a lot) you will see that it will re-start immediately but will die in a few minutes. If you wait 5 minutes to re-start it will last 15- 20 minutes. If you wait 15 minutes it will last the entire hour.

 

[Mike VS]

I'm still of this belief to take everything out of the equation except the injection pump. I might go as far as setting up a gravity feed fuel system like an IV bag.

I probably will get around to setting that up soon, but I feel pretty sure the fuel pump and filter are not the problem.

 

[Mike VS]

You're probably right, but what's left? $$$ Injection pump???

Shhhhhh.... I don't want to hear that!

 

[oldnslo]

Is there any way to install a pressure transducer or gauge in one of the injector lines so that you could monitor the fuel pressure while engine is running. Then does fuel pressure drop to zero suddenly. This would confirm fuel loss as cause.

 

[Kyle_in_Tex]

Yup... If you go back and read (I know it's a lot) you will see that it will re-start immediately but will die in a few minutes. If you wait 5 minutes to re-start it will last 15- 20 minutes. If you wait 15 minutes it will last the entire hour.

How long it would run after re-start was what I was wondering about.

 

[dstig1]

Could you record the audio of what it does on your phone and post? Maybe start recording at 30 min or so and then clip out the long lead-up and just post the relevant audio from the final couple minutes and then you trying to crank it again. You could post it to Youtube if TBN won't take an audio file, which it probably won't. I've been following this but haven't had much to add beyond what others have posted, so have not posted until now. I have to say it sure sounds like it is not fuel as you say since it dies suddenly. Every time I see a piece of equipment run out of fuel it sputters a bit and catches again as the last few drops go in. It doesn't just die like <that> That is why I think it would help to hear what is going on.

 

[Kyle_in_Tex]

I think your only choice is to put the whole thing in a crate and ship it to me. I'm in need of another mower. :thumbsup:

No, actually he could take a barley pop break every hour (or lemonade). Perfect mower.

 

[Mike VS]

Could you record the audio of what it does on your phone and post? Maybe start recording at 30 min or so and then clip out the long lead-up and just post the relevant audio from the final couple minutes and then you trying to crank it again. You could post it to Youtube if TBN won't take an audio file, which it probably won't. I've been following this but haven't had much to add beyond what others have posted, so have not posted until now. I have to say it sure sounds like it is not fuel as you say since it dies suddenly. Every time I see a piece of equipment run out of fuel it sputters a bit and catches again as the last few drops go in. It doesn't just die like <that> That is why I think it would help to hear what is going on.

Thanks... While I appreciate your attempts at curing my woes, that's more headache than I can handle right now but I will say this: Imagine you are cutting the grass at a nice clip when somebody runs up behind you and turns the key off. That's what it SOUNDS like, no coughing or sputtering but I will say this; I have been able to keep it running by being real quick and pulling back the throttle and hitting the PTO switch. Once or twice this kept it going and I was able to wait a minute at idle and then throttle up, but only for a few minutes before it died.
At this point, I will probably fix a temp gravity fuel tank around my neck and watch the strange looks of my neighbors.

 

[Mike VS]

I think your only choice is to put the whole thing in a crate and ship it to me. I'm in need of another mower. :thumbsup:

Nope, I love using this mower more than any toy I have ever had. It goes anywhere. I might try driving up the walls of my house some day to clean my gutters... unless of course... IT DIES ON THE WAY UP!

 

[ruffdog]

Neighbor had a Allis WD that would just stop out of the blue. It acted like it ran out of fuel but we would pull the fuel bowl and it had plenty and everything was very clean. Except, one time, while looking in the tank, I saw something different. It was a piece of brass shim stock about 3/4" square. Every once in a while the shim would get close to the outlet and get sucked against it. By the time we would pull the bowl, it had floated away. At least your problem is more consistent.