I've got a neighbor that has a 52 H 12Volt that's runs great as long as he gives it a little choke...will fall on it's face when choke is pushed in. I don't know squat about these tractors but,I've worked on several Ford N tractors so he asked me to give it a look. Good blue spark to all plugs, plenty of fuel from tank to carb, air filter clean, battery fully charged, timing must be on because it purrs like a kitten a long as the choke is out a little...sounds like a carb issue to me...what do you guys think. If it is the carb is the basic carb kit usually all that is needed. It is a 50981dc carb and I can't find comprehensive kit on this site for it...Thanks for the help Dan