HELP!!!

[tombodett]

HELP!!! I was on my B7800 brush hogging for maybe 20 minutes. It bogged down suddenly. I tried idling it down it almost died I idled it back up but could only get about 1200 RPMs. I killed it, realized I was in the sun, restarted it, (it had to be wide open and still could barely pull its own weight) pulled it into the shade and killed it again. I knocked out the air filter and cleaned out the fuel filter (which is only like 2 months old). I started her again, it tried to idle up for just a second then bogged down and died. I let it set overnight, restarted it and I still cant get it to hold RPMs above 1000 or so. Any advice would be greatly appreciated.

 

[Fuddy1952]

Check the simple things first. Is grill screen clear? I had mine clog when Bush hogging and it got overheated, screen was clogged solid with hay.
I assume you have a local dealer... I'd call them, describe problem. It sounds like fuel related. How many hours since they were replaced...fuel, air?

 

[mljenkins]

HELP!!! I was on my B7800 brush hogging for maybe 20 minutes. It bogged down suddenly. I tried idling it down it almost died I idled it back up but could only get about 1200 RPMs. I killed it, realized I was in the sun, restarted it, (it had to be wide open and still could barely pull its own weight) pulled it into the shade and killed it again. I knocked out the air filter and cleaned out the fuel filter (which is only like 2 months old). I started her again, it tried to idle up for just a second then bogged down and died. I let it set overnight, restarted it and I still cant get it to hold RPMs above 1000 or so. Any advice would be greatly appreciated.

Sounds like fuel. You didn’t mention dumping the fuel water separator if it has one. Maybe something is in the tank blocking the intake?

This is exactly what my l6060 did when the fuel gelled up on me this past winter (thought there was additive in the fuel but there wasn’t).

 

[diesel85]

Have you checked the throttle linkage?

 

[PILOON]

Quote "Sounds like fuel. You didn’t mention dumping the fuel water separator if it has one. Maybe something is in the tank blocking the intake?"

That's my guess also. AKA fuel starvation.
While not the cure, blowing air via the fuel delivery line would provide proof if once reconnected the tractor ran as it should.

 

[moship]

When full delivery is suspected, I disconnect the rubber fuel line at the filter inlet and drain the entire contents into a suitable container while monitoring the fuel flow. Fuel flow should be very steady and at a very reasonable rate. Also carefully check what the fuel looks like. You might be very surprised at what you find in your fuel.

Use a clean container that will be easy to see the fuel and let it set for a period of time to allow any foreign matter to collect at the bottom. Just make certain the container is sized appropriately or use several containers.

If you find any gel like or black substance suggest using a Fuel Biocide of your choice. Examples:
Bio Kleen Diesel Fuel Biocide - Power Service

STA-BIL Diesel Biocide, 16 fl. oz. at Tractor Supply Co.

Report back what you find.