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8n Bacfired, died: Fixed for now.

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OKcity8n

07-07-2001 09:22:26




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Working with multiple problems and slight paranoia is not a good combination. Facts: The coil is not fried; there are 2 resistors in the circuit; and the coil IS labeled as 12 volts. After taking off the distributor to check things out, it was obvious that there was no VISIBLE physical damage to the coil. With 2 resistors, I doubted seriously if there was going to be any damage. I never take take the distributor off without checking everything. When I did, I found the points had closed to the point of having nearly no gap. My first post said it felt like the timing was off by the way it tried to start. I readjusted the points, cleaned everything up, made sure all the ignition switch/terminal block/resistor connections were tight and bright, then fired her up on 3 cranks. In fear of burning up the coil if I removed the 2 resistors, I left them in. The doggone thing works. I tested it for about 45 minutes by grading the driveway until the temp got over 90; too hot for me. I parked it in the shed to await another day for testing by removing the second resistor. This makes me feel very uncomfortable with the 12 volt, stick-on labels on these coils. Makes me wish the previous owner had given me the 6 volt components, too. I know he converted for the wrong reasons because I had to rebuild the starter shortly after I got the tractor. It would barely turn the engine. After the rebuild, I haven't even run the battery down. This saga may be continued. By the way, is the throttle rod supposed to stay in whatever position I put it in? Today, it started flipping itself back to idle. Has my govenor decided to I don't have enough work to do?

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Bill W.

07-07-2001 19:15:45




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 Re: 8n Bacfired, died: Fixed for now. in reply to OKcity8n, 07-07-2001 09:22:26  
Your throttle plate is probably somewhat worn but your biggest problem is likely the little ball under the throttle shaft which rides on the throttle plate. Take the shaft out; it disconnects at the lower end. Take narrow chisel and losen sides of shaft which hold ball in place. The ball likely has a bad flat spot and therefore will not hold on the plate. You don't have to replace the ball; just turn it over so round side can rub on plate. Punch sides of shaft back around steel ball to hold it. Also, while you have the shaft out, replace spring at bottom of shaft with heavier, more taut spring, available at your local hardware store. Also attach throttle tension spring on bottom to connector where engine bolts to bell housing. Your throttle will work much better.

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OKcity8n

07-07-2001 10:36:50




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 Re: 8n Bacfired, died: Fixed for now. in reply to OKcity8n, 07-07-2001 09:22:26  
Hey folks, thanks for your comments. I was looking over the adjustments and the govenor link in the book. Looks like a piece of cake, but I ain't calling it cake till I slice it. Laffs.



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raytasch

07-07-2001 10:09:13




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 Re: 8n Bacfired, died: Fixed for now. in reply to OKcity8n, 07-07-2001 09:22:26  
Make sure the throttle-governor compensation spring is attached. Hooks from the lower throttle arm to a bracket on the flywheel housing. ray



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Greg

07-07-2001 09:43:42




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 Re: 8n Bacfired, died: Fixed for now. in reply to OKcity8n, 07-07-2001 09:22:26  
Hi OKcity8N, That throttle is adjustable. Look at the bottom of the rod. You should see a small bracket with 2 bolts in it and a spring on the rod. Loosen the bolts and slide the bracket down, this will push the spring down and put more down tension on the rod. Should keep your throttle from backing down on you.



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AL(Ca)

07-07-2001 09:42:29




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 Re: 8n Bacfired, died: Fixed for now. in reply to OKcity8n, 07-07-2001 09:22:26  
There are two types of 12volt coils, one that requires the ballast resistor and one that does not. If somebody can tell me how to tell the difference, I would sure like to know.



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Phil (AZ)

07-07-2001 14:00:33




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 Re: Re: 8n Bacfired, died: Fixed for now. in reply to AL(Ca), 07-07-2001 09:42:29  
Al, Most Coils used on 12V systems are low inductive and measure < (less than) 1 (One) Ohm.
and require some type of current limiting.

The Standard NH ford coils are of this type and
will also measure < 1 ohm.

The special "so called" 12V front mount will measure about ~ 3 Ohms

FYI if you installed a 3 Ohm coil on a 8 cyl car it would be lucky to REV 2000 before it flatlined

JMHO

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Gary

07-07-2001 09:37:22




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 Re: 8n Bacfired, died: Fixed for now. in reply to OKcity8n, 07-07-2001 09:22:26  
Mime does the same thing. I think its the throttle plate Quadrant thts wore out. good luck



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