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John Deere Tractors Discussion Forum
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Carb problems pony JD- R

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Arvin Farmer

08-13-2004 21:32:20




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Pony will only run on or near full choke, Cleaned the fuel line and made sure the needle in line was not stuck. replaced all gaskets and o rings. Pony will not run up to speed to start the main engine unless, use of full choke. Replaced the plugs. pony is in good shape. Whats wrong?




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AcE

08-18-2004 19:49:39




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 Re: Carb problems pony JD- R in reply to Arvin Farmer, 08-13-2004 21:32:20  
ALSO.. Heres a big IF:
Has the pony motor had a piston removed from it, or is it a factory single cylinder engine..
Something about being easier to start in winter or something like that.. "WHATEVER"
All I know about that is that there is spring loaded vacuum plate in the carb on the pony motors on the R"s.

Pretty simple concept here. You take out one of the pistons, you cut the vacuum in half.
That plate would also have to be adjusted "And they seem to be really finiky".

Now.. if I could only find a matching piston and connecting rod SO I CAN FIX MINE!!!!

My biggest issue however, was the gaskets as mentioned previously Good luck, AcE

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AcE

08-17-2004 18:41:47




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 Re: Carb problems pony JD- R in reply to Arvin Farmer, 08-13-2004 21:32:20  
Check the gaskets.


i had a similar problem,, it was just bad gaskets. Also, check the screen that is on bottom of fuel pick-up tube.



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Tony

08-15-2004 09:22:11




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 Re: Carb problems pony JD- R in reply to Arvin Farmer, 08-13-2004 21:32:20  
My R pony is very sensitive also. Is yours the type that the lever is pulled out to control the speed? Mine is and the adjustment screew has to be just about closed to run good. If the air ajustment is on it mine is set where the wire stop and the know end at the same together. Good luck and hope our helpful hints help



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David from Kansas

08-14-2004 05:55:32




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 Re: Carb problems pony JD- R in reply to Arvin Farmer, 08-13-2004 21:32:20  
Did you try adjusting the needle on the carb? Mine is very sensitive and just a slight 5 degree or so turn will make a lot of difference. Your operator's manual should show you how to do this. Good luck.
David



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