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Ford Tractors Discussion Forum
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Re: Ford 640 - How should the coil be wired

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soundguy

03-28-2013 11:37:02
108.112.36.0



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ditto what jmor said.

the coil backwards thing is something you could see on an oscope or other specialized equipment.. etc..




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tgemignani

03-28-2013 12:21:49
204.77.163.4



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 Re: Ford 640 - How should the coil be wired in reply to soundguy, 03-28-2013 11:37:02  
Thanks guys I appreciate all the good info. I'm going to check the points this weekend.
It's running like garbage currently but I attribute that to it being a south Texas tractor that was transplanted to northern Kansas in sub zero temps.



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old

03-28-2013 19:01:33
209.86.226.34



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 Re: Ford 640 - How should the coil be wired in reply to tgemignani, 03-28-2013 12:21:49  
Also check the air cleaner. Those are one thing few people service and can cause many problems if filled with water which if cold will freeze and then you get a non-running engine



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tgemignani

03-28-2013 19:16:13
184.2.118.1



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 Re: Ford 640 - How should the coil be wired in reply to old, 03-28-2013 19:01:33  
Quoting Removed, click Modern View to see

Once again I appreciate the info.

I have the tractor running at idle but it seems to be missing. When I advance the throttle to high RPM it runs decent for a bit but when warm I can't bring the throttle back down or it will rev from high to low and eventually die.
On a possibly related note, quite a bit of fuel (a puddle) is leaking from the carb when the tractor is off from what appears to be the throttle linkage. I'm assuming it needs a carb rebuild but I didn't know if the missing and inability to go to low rpm is mostly spark related.

Thanks

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old

03-28-2013 19:34:56
209.86.226.34



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 Re: Ford 640 - How should the coil be wired in reply to tgemignani, 03-28-2013 19:16:13  
As Royce said good to shut the gas off when not running or you can get gas in the oil and that can mean an engine rebuild. If in fact the leak is at the throttle shaft that is a vacuum leak and that will cause odd problems and needs fixed



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Royse

03-28-2013 19:24:11
69.36.49.151



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 Re: Ford 640 - How should the coil be wired in reply to tgemignani, 03-28-2013 19:16:13  
Quoting Removed, click Modern View to see

Its always a good idea to shut the fuel off when the tractor is off.

The fact that its leaking is, as you said, is an indication of it needing carb work.

At the least the needle valve is not seating correctly.

That's a pretty common thing on tractors that have set for a while though.

A decent carb rebuild may solve the majority of the problems.

Still a good idea to service the air filter and any other items that have been neglected.

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soundguy

03-28-2013 17:29:42
108.112.69.43



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 Re: Ford 640 - How should the coil be wired in reply to tgemignani, 03-28-2013 12:21:49  
some tractors need a lil more main needle in the cold. you can test this with a tug of choke...



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