Mowing Need help if possible

[calvincoolidge]

I just bought a JD 790 used. The guy I bought it from looks to have taken really good care of the tractor. I ran it for about 7-8 hours the first day cutting roads and plots. It ran like well oiled machine. The next morning I hopped on and started cutting. It would run for about 3-4 minutes and would cut off. It didn't spit and sputter like there was something wrong. It cut off like you would stand up off the seat, or a safety feature was kicking in. It would crank right up and cut another 3-4 minutes and do the same. After about the 5th time, I trailered her back up. Anyone ever have this problem before? Anyone have any suggestions? I can take it to the dealer, but if it is a simple fix I had rather not. I'm open to anything. Thanks in advance to any suggestions.

 

[plowindeeper]

maybe something in your fuel tank (sludge build up, acorn, leaf, ect) happened to me once or a lose safety wire that happened once also

 

[DennisFolsom]

My first thought is that it might be a either a clogged fuel filter or water in the fuel. Some of the more experienced guys on here, especially those who have owned JD 790's, may have other suggestions.

I suspect that, when you change the fuel filter on that model, you will have to bleed the air out of the fuel system to get it going again.

 

[foggy1111]

It's a fuel problem IMO. First thing you might do is change the fuel filter and get any contaminants out of the "bowl".

Next thing is check your points and condensor. (OK....that's a joke :laughing).

 

[whbrittain]

I just bought a JD 790 used. The guy I bought it from looks to have taken really good care of the tractor. I ran it for about 7-8 hours the first day cutting roads and plots. It ran like well oiled machine. The next morning I hopped on and started cutting. It would run for about 3-4 minutes and would cut off. It didn't spit and sputter like there was something wrong. It cut off like you would stand up off the seat, or a safety feature was kicking in. It would crank right up and cut another 3-4 minutes and do the same. After about the 5th time, I trailered her back up. Anyone ever have this problem before? Anyone have any suggestions? I can take it to the dealer, but if it is a simple fix I had rather not. I'm open to anything. Thanks in advance to any suggestions.

You didn't say if you refueled. It sounds like a clogged fuel filter to me. Water being the most likely culprit.

 

[tomd999]

Hiya,

The first troubleshooting step would be to loosen the fuel filler cap when it dies and if you hear air rushing into the tank, your tank vent is plugged or the vent in the cap is plugged.

Tom

 

[dex3361]

Sounds fuel related to me. I would do as the others have said check the tank vent. Inspect the inside of the tank for debris. Check the fuel flow from the tank while you have the fuel filter off. Replace the fuel filter and read up on bleeding the air out of the injectors before you start.:thumbsup:

 

[Egon]

Good Morning and Welcome.:thumbsup::thumbsup:


Another voice citing fuel delivery problem.

Check all the fuel supply hoses as well right up to the injection pump.

There will be other threads describing the same type of problem you have.

 

[Soundguy]

deffinately sounds like fuel...

soundguy

 

[kennyd]

I would jumper the seat switch to take that out of the loop. The didn't spit and sputter comment suggests to me it's not fuel related.