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Case Tractors Discussion Forum
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Re: Model D not running good under load

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Author  [Modern View]

07-14-2013 07:41:58

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The fuel systems are very basic. Weak spark issues will send you chasing carb overhauls for ever. Under load, the combustion chamber is full of fuel and air, it takes a much hotter spark to jump a gap then under light or no load conditions. Plugs could be an issue by I'd bet the farm on a weak mag. Over the years I've replaced all my magnetos with distributers and 12v alternators and have very reliable older tractors

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07-14-2013 10:13:40

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 Re: Model D not running good under load in reply to oldproudvet, 07-14-2013 07:41:58  
thanks for all the suggestions! This tractor had the same problem before I rebuild a carburetor. so I think I will chase after the spark.which direction do I go for 12 volt conversion if I do so.? the serial number on my model D's is 5003699 what year would that be?

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Case Nutty 1660

07-14-2013 09:04:28

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 Re: Model D not running good under load in reply to oldproudvet, 07-14-2013 07:41:58  
I have seen this same condition as well worked on a carb till I was blue in the face finally pulled another carb know to be good and found it was a mag problem cnt

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