jd 2010 runs only with choke slighty pulled out

michael ibach · Jun 12, 2013

first and foremost, thank you all for the fixes, pointers, and help with my jd 2010. i've been dealing with this choke issue for sometime. the engine will only run with the choke pulled out about 1/3. i just finished painting and had it delivered to my rec land. while riding the tractor and not touching the throttle the engines rpm would increase. i would then have to adjust the throttle to decrease the rpms. this cycle was random. the tractor was never under any load other than gear two. any ideas? could this have anything to do with the float? i rebuilt the carb and replaced a faulty float. should i have adjusted the height of the float? thanks for all of your help.

clampdaddy · Jun 12, 2013

Hmmm. I do know that when I shut the fuel levers on both my model A and my G they pick up rpms when they lean out right before they run out of gas. An engine that needs choke is usually because there's either a vacuum leak or a lack of fuel. If it wasn't for the high idle issue I'd guess that there was a clogged fuel passage in the carb but that intermittent high idle makes me think its a fuel delivery issue. How's the screen in the sediment bowl? When you pull the fuel line and turn on the fuel does it run pretty good? If so it probably is the float setting. I shove a piece of small clear weed eater/chainsaw gas line into the drain cock and run it up alongside the bowl to check the actual fuel level. If that's not it a fuel cap that isn't venting could also be suspect.

Tim14167 · Jun 13, 2013

It sounds as if there is blockagae in the fuel delivery(valve, line, sediment bowl). Remove the fuel line form the carb. You should have a healthy stream of gas coming out. If you don't then there is blockage. As for the increase in RPM's, the governor is hanging up. Since being a tractor form the 60's the linkage from the throttal to the carb and governor needs to be replaced / rebuilt / adjusted to the proper length as stated in the service manual.
I had simular issues with my 2010 a couple of years ago and I could not belive the difference in the way the tractor ran after I replaced and adjusted the linkage.

Ray · Jun 13, 2013

That's common on debuques.The carb needs rebuilt.It has a passage blocked.Mine do that if they have been setting for a while.

michael ibach · Jun 13, 2013

thanks for the replies! i'm going to start by checking the fuel flow and eliminate from there!

mike

Jo Bird · Jun 13, 2013

Michael
Yes, you must set the float, I use a drill stem of the correct size as a gauge rather then try to measure with a ruler. Moving a tractor often causes sediment in the tank to be stirred up and plug the fuel system. Re clean the sediment bowl and the carb. Originally that carb had a screen behind the inlet elbow in the carb. I would not try to adjust the governor at this time, get it to run without the choke before going down that road.
Jo

Hugh McKinney · Jun 13, 2013

I agree with the vacuum leak scenario: one way that you can diagnose a vacuum leak on a spark ignition engine is to take a propane torch, DON'T LIGHT IT! But take the torch and open the valve and hold it in various locations near the carburetor/intake manifold gaskets while the engine is idling. If a leak is nearby, it will suck the propane into the airstream going into the engine and it should smooth out and no longer require the choke to run smoothly. It's an old trick from mechanics who have long passed on, but it works!

jd 2010 runs only with choke slighty pulled out

michael ibach

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michael ibach

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