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Garden Tractors Discussion Forum

JD316 w/Onan Questions

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Author  [Modern View]

09-24-2009 08:27:58

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Just got my mower back from the shop. New trigger switch, carb rebuild, filters all around, new plugs and coil. Ran great for a couple of hours. Now it "hunts" at all speeds except wide open. Choking it will even it out a bit. Running under full load (mowing) also helps. It seems like a governor type problem. I read a thread that talked about adjusting the governor spring. Where is this and how do you adjust it? Or, could it be the high speed jet? I haven"t tried anything yet, it is just as it came back from the shop.

Thanks in advance for any advice.

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Ed in Va.

10-01-2009 05:27:04

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 Re: JD316 w/Onan Questions in reply to DaveK(IN), 09-24-2009 08:27:58  
Just a passing thought.

Everything worked fine for about 3 hours...

If the choke is being pulled to get the motor running somewhat better...

Could there be a possibility of water in the fuel?

Ed JD318

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09-25-2009 15:55:00

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 Re: JD316 w/Onan Questions in reply to DaveK(IN), 09-24-2009 08:27:58  
Thanks guys, I think I will take it back in to the shop. This guy has done good work for me for years so I hope he takes a little ownership of this problem. The carb has less than 3 hours on it since the rebuild and the fuel filter was also replaced along with the air filters.

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09-25-2009 05:45:14

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 Re: JD316 w/Onan Questions in reply to DaveK(IN), 09-24-2009 08:27:58  
I myself,would take it back to that shop.You said carb.rebuild?That is your "key" phase.Course that's just me.Dude11

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09-24-2009 08:56:11

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 Re: JD316 w/Onan Questions in reply to DaveK(IN), 09-24-2009 08:27:58  
engine surge and pulling choke out helps indacates lean run condition
lack of fuel thur carb
hope this helps Gary

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steve in in

09-24-2009 10:57:15

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 Re: JD316 w/Onan Questions in reply to chevy65, 09-24-2009 08:56:11  
I agree. You should be able to take the top cover off the carburetor and clean the carb out. If that doesn't do it, then you need to pull the intake manifold off to get the whole carb off. A much bigger task.

If you are careful, you shouldn't have to replace any gaskets. Those rebuild kits get really spendy.

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