B John Deer

If you have a JD-B that idles smooth then you have a very big problem with it. Now if it idles and sounds sort of like a hit and miss engine then it is running just the way it should and the more hit/miss it sounds then the better it is running believe it or not but that it how they are and that is why they are called popping Johnny's
 
i would say if it sounds like a hit an miss then you have a problem. why should it be miss firing? you should have an even steady puff, puff, out the exhaust.its not a hit and miss so it shouldnt sound like one.could be governor or carb adjustment. maybe points, timing.i know the D will idle smooth and even as can be when tuned up. you can count each time the plugs fire.
 

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