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Order Ford 4000 Parts Online

Re: ford 4000 carb

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Author  [Modern View]

10-02-2013 18:14:29

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Its been a long time since I owned a 4000 three cylinder gas tractor but I believe the Holly carburetor is a fixed jet carburetor. The adjustment screw only controls the idle air, it has no effect on the power jet which is a fixed jet. Adjust the idle air adjustment screw to give the smoothest idle at about 500RPMs. Joe

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hawk from decatur

10-02-2013 19:13:48

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 Re: ford 4000 carb in reply to jbp, 10-02-2013 18:14:29  
thx joe so are u saying it makes no difference how many turns out the needle is? yhe manuel says start with one turn out. do i keep turning it out till i get my 500 rpms thx

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10-03-2013 07:07:56

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 Re: ford 4000 carb in reply to hawk from decatur, 10-02-2013 19:13:48  
There is also an idle speed adjustment screw on the carburetor that determines the idle speed of the engine. It keeps the throttle plate from completely closing at idle. It is located on the back side of the carburetor near where the governor linkage connects to the carburator. That screw controls idle speed, the needle controls the idle mixture. Hope this helps you.

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