Diesel engine problem

[Walkin Horse]

Last year I had a problem with my hoe running bad until it finally quit. I had the diesel germ. I drained the tank and used a suck bucket to clean it. I found an old cap gasket and a leaf in it. The germ was like a snotty mass that was sliding around on the bottom. Once I got it cleaned I have used PS bio cleaner in it.

 

[Billrog]

I doubt very much you'll have to deal with injectors or pump but it may not hurt while your at it to just replace the fuel line as well if you can't see or find nothing obvious. Because like holzboat said some times they break down inside and this could cause intermittent problems as well if the rubber is acting like a flap. Just thought of another thing I've had happen if the fuel line looks wet at all they sometimes get little pin holes and suck air.

 

[oldpilgrim]

did you put fuel conditioner in the tank? You should, especially in winter.

 

[dieseleric]

Could even be a old fuel line collapsing internally. replace old fuel line maybe? I've even seen valve lash do such things getting to tight. That is usually a sign of running rough all the time though.

 

[kudzu04]

How old is the tractor? Sometimes the fuel hoses can start to break down and cause problems that are not visible.

You know, this garden tractor (JD 430) is 24 years old. Original fuel hoses. It does act like it is sucking up air and fuel as it will occasionally rev then hit and miss. I believe I'll try that - either way it needs to be done.

 

[geneP]

I don't think that checking the fuel cap to be vented has been mentioned. A plugged cap vent will cause a vacuum in the tank after running a while. It is a long shot, but can be checked by loosening and see if problem clears up.

 

[markmechanic]

Check air filter for replacement, post Yanmar model & series numbers, thanks.
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