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Harry Ferguson Tractors Discussion Forum
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TO-35 carb adjustment question

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George in MI

05-22-2006 12:29:32




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I have T0-35 and I wondered where the idle adjustment screw and the power jet screw should be set. On my TO-20, the shop manual says 7/8s out on the idle jet, and about 1 or bit more turns out on the power jet.

Are the TO-35 starting points the same?




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mark from the fort

05-23-2006 04:16:19




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 Re: TO-35 carb adjustment question in reply to George in MI, 05-22-2006 12:29:32  
Marvel-Shebler:
Idle Air: Approx. 1 full turn open from closed or until the engine idles smoothly when warm.
Main Jet: 1-1/4 turns open-fine tune after she warms up to a smooth idle.
It is noted that too lean of a main jet setting (less than 1 full turn open) will reduce power, cause the engine to run hotter than norm, and eventually cause burnt valves.
The manual says it should NEVER be less than 1 full turn open on the main jet.
Field test: "Field test tractor under normal load by quickly moving the throttle from half open to fully open position--if engine coughs or stalls, open main jet another 1/16 and repeat test. Repeat steps until engine reponds immediately to acceleration and runs smoothly."
Glad to give some help back. Mark

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ILL John

05-22-2006 20:57:14




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 Re: TO-35 carb adjustment question in reply to George in MI, 05-22-2006 12:29:32  
All the NAPA carb kits I get say 1 turn out for the idle, 1 turn out for the main jet. It works on the MMs and Fords, never had to do the one on my TO35. John



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Landon

05-22-2006 17:52:18




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 Re: TO-35 carb adjustment question in reply to George in MI, 05-22-2006 12:29:32  
George, My manual states for a Zenith carb. idle mixture is turned out 1 turn from closed position or until the engine idles smoothly when warm ( Quote ) Main fuel adjustment says closed all the way then 7 turns out. Idle is to set @ 450 RPM

Marvel-Schebler carb. is not mentioned as far as detailed adjustments.



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George in MI

05-22-2006 19:06:20




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 this one does have the Marvel-Schebler carb in reply to Landon, 05-22-2006 17:52:18  
This tractor has the Marvel-Schebler, not the Zenith carb.



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