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Fast idle on new carb


 
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Steve (Tx)
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Joined: 25 Feb 2010
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PostPosted: Wed Nov 07, 2012 4:01 pm    Post subject: Fast idle on new carb Reply to specific post Reply with quote

I put a new Zenith carb on my Ford 2000 4 cylinder. The tractor starts immediately but the idle is super fast, in fact, it is so fast that I cannot increase the rpm"s by increasing the throttle.

As far as I can tell, there are only two adjustment screws; one over the bowl which is probably the air mixture and one at the throttle linkage. With both screws seated or both screws way out or a combo of each, the rpm"s do not slow down.

Any advice is appreciated.

Steve
 
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Royse
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Joined: 17 Jan 2011
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Location: Michigan

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PostPosted: Wed Nov 07, 2012 4:28 pm    Post subject: Re: Fast idle on new carb Reply to specific post Reply with quote

Is the throttle plate in place in the throat and closing when you move the linkage?
 
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Steve (Tx)
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PostPosted: Wed Nov 07, 2012 4:32 pm    Post subject: Re: Fast idle on new carb Reply to specific post Reply with quote

I will take the carb off and check that out.

Thanks
 
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Steve (Tx)
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PostPosted: Wed Nov 07, 2012 6:28 pm    Post subject: Re: Fast idle on new carb Reply to specific post Reply with quote

Royce,

You nailed it. Even though I thought the idle screw was nearly out all the way, it turns out it wasn't even close.

I must have made another 20 complete turns to get the butterfly to seat in the throat. From there, I put the carb back on and made the usual back and forth adjustments. The tractor is running smoothly.

Thanks alot,

Steve
 
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Steve (Tx)
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PostPosted: Wed Nov 07, 2012 6:31 pm    Post subject: Re: Fast idle on new carb Reply to specific post Reply with quote

Royse,

Excuse me for mispelling your name earlier.

Steve
 
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Royse
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Location: Michigan

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PostPosted: Wed Nov 07, 2012 7:06 pm    Post subject: Re: Fast idle on new carb Reply to specific post Reply with quote

Woohoo! I always love those "free" fixes!
Glad you got it going! Very Happy
 
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