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In Reply to: John Deere 350 posted by Joe Bob Everett on Sunday, February 21, 2010:
The first thing I would suspect is the vent to the fuel tank. Your vent tube for the tank is located on the inside of the fill neck which you can see as soon as you remove the fill cap. This tube is about a quarter of an inch in diameter and runs through the tank and out through the bottom. Insects, ( Mud Dobbers ) love to fill these tubes with mud and stop them from venting. Your machine will run about twenty minutes to a half an hour before the vacuum build to the point of not letting your fuel flow. Check this tube to see if it will let air pass freely through it. You can run a small wire through it to clean it out or just blow it out with compressed air. I really suspect this is your problem. The second thing I would look for is inside your fuel tank. You may have debris or some kind of trash floating over the fuel outlet. Thus causing a restriction in fuel flow. If you find both of these suggestions to be okay, check your fuel feed line to your fuel transfer pump and check the pump itself. Make sure the line is free of any kinks or damage that could cause a lack of fuel to your transfer pump. Check the pump for proper function. Also check the return fuel line from your injectors back to your fuel tank. All of these things can cause your problem. The thing to remember is, your fuel needs to flow freely from the tank to the injection pump and back again. All without restriction or being held back because of vacuum forming in the tank. If you still have problems feel free to e-mail me at ( ).
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