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Harry Ferguson Tractors Discussion Forum
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TO20 won't start, weak spark at coil

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RCB

10-19-2006 20:54:11




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Hi,
First time posting. TO20 was running great, then won't start. Weak orange spark from coil, almost no spark at plugs. have recently replaced coil, distributor, starter switch,voltage regulator, plug wires, generator was checked out, all re-wired.
How do i check voltage to coil and beyond?




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Randy Beck

10-31-2006 19:17:37




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 Re: TO20 won't start, weak spark at coil in reply to RCB, 10-19-2006 20:54:11  
Thanks all,
I will try a few things (switch, clean up ground).



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DennisPinOhio

10-21-2006 06:11:55




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 Re: TO20 won't start, weak spark at coil in reply to RCB, 10-19-2006 20:54:11  
I had a problem like yours with my TE 20 once. I removed the points and cleaned them with a business card. The card is just abrasive enough to clean up the contacts, without removing a lot of material.
I"ve since corrected the problem entirely by installing a Pertronix Ignitor, which is a modern, solid-state ignition component, that installs in the distributor in place of the points. My tractor starts as soon as I touch the key.

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Jerry/MT

10-20-2006 20:15:23




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 Re: TO20 won't start, weak spark at coil in reply to RCB, 10-19-2006 20:54:11  
I presume that when you say a "...weak spark at the coil..." you have removed the center terminal from the distributor, held it near a good ground, turned on the key and tried a start and got a weak spark. If that's the case, you need to make sure that you have a good connection from the battery, to and through the key switch, to the coil and to the distributor. If you have a volt meter, you should see near battery voltage all the way to the battery side of the coil with the points closed and the key switch on. On the distributor side of the coil, with the points closed, you should see less than a volt.If you do, then make sure that your points are clean and set correctly. I presume you have a six volt system (you mentioned the generator) so it's doubly important that all the primary ignition circuit connections are clean and tight. Is your battery all charged up? Also make sure that your battery ground connection (+ lead for the 6V) is making good contact. If all this looks good, you may have a bad condensor.
Hope this helps

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Ron Lindquist

10-20-2006 07:21:43




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 Re: TO20 won't start, weak spark at coil in reply to RCB, 10-19-2006 20:54:11  
Hi, I don't know much but if the old coil worked, maybe put it back in and see if that helps.
Ron



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