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Farmall & IHC Tractors Discussion Forum
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300 utility (again)

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RRI

09-04-2004 04:50:29




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Found the problem with the cylinder missfire. Had a cracked rotor cap. Tractor still only runs for a few minutes then acts like it runs out of gas (had the carb rebuilt and they said the float was alright). Also would like to know how the coil is supposed to be hooked up. The tractor was converted to 12v neg ground.




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RRI

09-05-2004 05:38:57




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 Thanks for the help in reply to RRI, 09-04-2004 04:50:29  
Problem was a burr on the float valve in the carburator.



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Loren

09-05-2004 09:46:57




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 Finding the problem IS a good thing. in reply to RRI, 09-05-2004 05:38:57  
Hate it when it just starts working again?.



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Unreserved dick

09-04-2004 08:44:55




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 Re: 300 utility (again) in reply to RRI, 09-04-2004 04:50:29  
On your possible fuel problem, this is pretty common with these tractors, often the root cause is a rusted gas tank. Things to check: gas cap vent plugged (resulting in pulling a vacuum on the tank), partially plugged filter at inlet to carb (at the end of the fuel line where it connects to the carb - this is the real choke point of the fuel system and many people don't realize it's there), crud in the bottom of the tank (empty the tank, pull the strainer off the bottom, and see what you've got). Some people end up lining the tank, but thus far I've been able to avoid it. Your carb probably has a drain plug which you can use to test the fuel supply - if you get a good sustained, pencil-sized flow you should be OK.

On the coil, some people use a "ballast resistor" with a 6-volt coil in a 12-volt conversion, but my preference is a new 12-volt coil (more readily available at this time, anyway) which avoids the Mickey Mouse wiring that the ballast resistor requires. Another possible cause of your stalling problem is a defective coil, so this would be part of a shotgun approach to solving that problem as well.

Hope this helps. Good luck.

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Loren

09-04-2004 21:15:41




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 I'll second the fuel inlet screen. in reply to Unreserved dick, 09-04-2004 08:44:55  
Take the fuel line off then the fitting in the carb. There's a screen there that gets plugged bad. Loren



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gwb

09-04-2004 05:59:02




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 Re: 300 utility (again) in reply to RRI, 09-04-2004 04:50:29  
If the thing runs at all, the coil is hooked up right, polarity-wise. Is your question about the dropping resistor, though?



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