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Ford Tractors Discussion Forum
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Re: 641 fuel issue?

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raycole

03-12-2013 15:37:33
69.170.106.11



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If the little clip under the rotor is missing then it will run rough. I'd lost mine once upon a time and tried to run without it - didn't go so well. It allows a lot of slop with the rotor, causing unreliable spark. I'd get one of those clips and go from there. They're apparently made of a really rare material...they aren't cheap for what they are... :-(




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EarlyBronco

03-12-2013 15:42:21
166.147.104.26



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 Re: 641 fuel issue? in reply to raycole, 03-12-2013 15:37:33  
Thanks Ray, that's what I needed to know, looks like ill be tracking down a spring clip or whatever Ford called them.
I wondered why the manual showed one but this 641 doesn't have anything above the dust cover.



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soundguy

03-12-2013 15:47:28
108.112.76.29



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 Re: 641 fuel issue? in reply to EarlyBronco, 03-12-2013 15:42:21  
so your rotor is just ratteling around loose on the distribuitor shaft?

in the mean time, put a piece of masking tape ont he shaft and push the rotor down on it.. :)



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EarlyBronco

03-12-2013 16:01:41
166.147.104.37



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 Re: 641 fuel issue? in reply to soundguy, 03-12-2013 15:47:28  
At the time, I really didn't think much about it because the new rotor had a really solid and firm fit, it really wasn't loose at all BUT if there's nothing pushing the rotor up to the correct position or its sitting to low-if that's possible (which i suspect) then that would explain a lot.



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soundguy

03-12-2013 16:19:55
108.112.76.29



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 Re: 641 fuel issue? in reply to EarlyBronco, 03-12-2013 16:01:41  
if it fits firm.. then its fine and it's not a rotor issue.

the rotor has a lil spring contact on it that touches the inside top of the cap.

as long as the rotor is not rettely loose ont he shaft.. it's not the rotor.

rough acceleration?

1, pull plugs and look at them.. if they are ashen white. you may be lean.

try this. tug on choke a bit when trying to accelerate. if it works better.. enrich the mainjet.

other things to look for.. make sure she is fireing on all cyls. when running above idle and sounding rough.. pull 1 plug wire and repalce at a time.. see if they all make a difference..and make about the same difference. if you find one that makes no difference.. or less difference.. that plug may not be fireing.. or that cyl may have an issue.. like stuck or burnt valve.s

a comp check may tell you more.

post back for details..e tc..

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EarlyBronco

03-12-2013 16:39:43
166.147.104.41



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 Re: 641 fuel issue? in reply to soundguy, 03-12-2013 16:19:55  
When I pulled the plugs for the tune up they were all 4 black but ill check the new plugs tomm



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