Fires but won't run

49erH

New User
I recently switched my tractor over to 12 volt I don"t know if that is the problem or not. After my conversion I had my tractor running for probably two weeks and the last time I parked it it wouldn"t start this morning. It fires for about a second or two but then shuts off. I have spark to my points and to my plugs. I have a new condensor on it. I do have gas getting into my carb. I took my carb off and apart and I ordered a rebuild kit for it. Didn"t know if anyone else had this problem and could help me out. Thanks
 
saw one that did that and it had a wire broken off by the ballast resistor it would fire in the start position but quit when you would let the key go back to run
 

99.9% of engines that won't fire or stay lit have an ignition problem.

6V systems do not require an ignition resistor since the coil is designed for 6 volts. If a 6 volt system is converted to 12 volts and nothing else changed, it will not take too long before the coil and/or points and condenser burn out from too high voltage. An engine may fire when first cranked but will not remain running due to one of the components being burned out.

When converting from 6V to 12V, either a ballast resistor needs to be wired in series in the primary coil circuit or a 12V coil with integral resistance needs to be installed.

If a ballast resistor or 12V coil has already been installed, and the problem has now cropped up, trouble shooting via the internet would only be a guess.
 
I put a 12 volt coil on it and on he side of the coil it says do
not use with external resistor.
 
Replace condenser if you haven't since it started acting up, even if it was just put on there before the problem happened.
Mike
 
I just put the condensor on it after it started acting up.
Thought that was the problem.
 
as a 'genera' statement, saying 6v systems do not require resistors, is incorrect.

ford 9n, 2n, and 8n using a front mount distribuitor are 6v oem, and have a coil AND ballast resistor.

just sayin...
 
i'm having the same type of problem. carb boiled out /bead blasted new kit / new plugs, cap rotor wires. runs misses then dies starts back up may back fire. .triple checked firing order i took carb apart couple times to double check.getting gas new wires i'm not happy with had to cut to fit. . i think it must be in ignition not sure 1966 case 930 took off valve covers rockets etc working . compression test was good 158 lbs +/- each cyl.. it's driving me nuts. thanks in advance john
 
I have found the problem. I wire from the ammeter to the
starter button had a very bad connection. Got it replaced and
she runs like a top now. At least I know my carb is cleaned!
 

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