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JD 50 Carb adj

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Lloyd ( in CT)

05-05-2003 06:27:10




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Under the big nut @ the bottom of the carb is what looks to be an adjustable stop(needle)this was plugged solid and after cleaning and inspection looks like it might be adjustable. Can someone tell me what the function is and where it should be adjusted after it is bottomed out? This is a duplex type carb. thanks,




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Clooney

05-05-2003 06:55:15




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 Re: JD 50 Carb adj in reply to Lloyd ( in CT), 05-05-2003 06:27:10  
Lloyd, that needle is the load needle. It controls [actually fine adjusts] the load system fuel delivery. Those dual DLTX carbs have fixed internal load jets & that external screw just fine tunes the mixture for best power & economy.
~The adjustment can vary due to engine wear, type of fuel, altitude & other variables. A good starting point is 2-3/4 turns out from seated then start slowly turning it in from there until you notice a power loss [under load] , then back it up slightly until it pulls good. They will usually run good at 2-3/4 out from seated but could be a little fuel thirsty at that setting�.

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Lloyd

05-05-2003 08:10:41




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 Re: Re: JD 50 Carb adj in reply to Clooney , 05-05-2003 06:55:15  
Clooney: will the tractor run at all with it screwed all the way in? When I got this tractor the complaint was no start,I got it to run but only w-choke closed,(w adjustment all the way in).Just curious,I have worked on a few of these but the 50 can be an odd duck,I should get a good manual for this model too. Thanks again-



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Clooney

05-05-2003 09:33:08




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 Re: Re: Re: JD 50 Carb adj in reply to Lloyd, 05-05-2003 08:10:41  
Lloyd, it depends on the carb & situation. On some that screw will be turned in all the way & others it will have to be out a turn or two to pull a load.
~In any case it should at least run with that screw all the way in but probably not pull a load very good & might not take the throttle very good either. If it hesitates when the throttle is advanced open that load screw a little more.
~About all you can do is open that screw about 2-3 turns & try it...

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lloyd

05-06-2003 05:57:13




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 Re: Re: Re: Re: JD 50 Carb adj in reply to Clooney , 05-05-2003 09:33:08  
Clooney: the tractor will not run unless fully choked.I adjusted it last night,no different,wont quite stall with choke open bnut wont run smooth until choke is closed.I had it aprt and cleaned it up,it looks good,where should I look.



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