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JD 3010 gas rough running

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Jason

09-19-2002 04:56:34




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The tractor will not start without the help of starter fluid. when running you must run it full open in order to keep it going. Reduce the throttle and she quits. It will not idle at all. The carb is getting plenty of gas. Everything up to there is working great. When running it pops, sputters, occasionally backfires and just generally has no power at all. I have noticed that the throttle on the carb butterflies open and closed when running thus causing the engine to rev up then down to an almost stall. Any suggestions?

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Greg H.

09-19-2002 13:07:45




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 Re: JD 3010 gas rough running in reply to Jason, 09-19-2002 04:56:34  
Jason, you might have a carb obstruction, but I doubt it. It sounds like you have some ignition problems. If original set up, ie points and condenser, check your points for frosting or sticking. Get out our timing light and check your timing as per your IT shop manual. If I were you I'd just go to deere or NAPA and get a set of points, condinsor, distributor cap, and rotor button, plug wires, Plugs, and with the change I have left over from 40 bucks I'd get a Coke, and go and see if the tune up parts fix the problem. If that doesn't help check and see what you've got coming into the coil, and have the output tested. All I know is if youve got fire and Air, all thats left to get if feul, and you'll need to take the carb off and start checking for obstructions. Good Luck. PS Also if all else fails could be a worn distributor, but I'd check everything else first. Later Greg H.

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Jason

09-19-2002 13:50:53




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 Re: Re: JD 3010 gas rough running in reply to Greg H., 09-19-2002 13:07:45  
Thanks Greg for the advise. I probably should have mentioned that I have already changed out the coil, plugs, cap, rotor, spark plug wires, points, etc. It was running very nicely for quite awhile after that. For some reason it decided to quit running period. Plugs were carbon fouled so I changed them out again. Spark etc is great. I have not checked the timing so I will do that. What really bothers me about the carb is this butterfly effect I see on the throttle linkage. It flips up and the tractor revs up then it drops down and almost stalls. Then it pops up again, then drops again. Up and down. All this while the hand control lever is all the way down. I don't know if this helps, but I have a zenith model 69 carb on this unit.

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Greg H.

09-20-2002 06:51:26




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 Re: Re: Re: JD 3010 gas rough running in reply to Jason, 09-19-2002 13:50:53  
If your linkages are connected and you are getting erratic RPM changes, perhaps tubba's right, maybe you have some problems with the old Gov.. That's an area with which I have never messed with, and I'm not going to begin to tell you what to expect as normal and proper functioning not having a shop manual in front of me. If it is the gov, not allowing the tractor to run at a consistant RPM, I still don't understand whay that would make it crack or miss. Is it more like a cough, and a miss, as in when the butterfly suddendly opens up, and the engine hesitates, as it begins to open up, or is is cracking, and sputting after that happens? If your ignitions up to par and you are cracking and poping after your disired rpm is reached than you might have a carb obstruction. If it only happens when it first opens up, you might not. At any rate, get some advise from someone that can help you with that Gov., and get the thing to where it's not opening up, and letting off without warning. I know this isn't much help, but I do wish you luck. later, Greg H.

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tubba_JD420C_ny

09-19-2002 15:11:37




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 Re: Re: Re: JD 3010 gas rough running in reply to Jason, 09-19-2002 13:50:53  
sounds like maybe a governor problem
good luck



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