I NEED SOME HELP!
I just bought another 1950 SC and have been doing normal maintenance, tune ups, and fixing leaks. It starts up on first push of starter button but I am having problems with adjusting the carb. Tractor runs great with no load or in lower gear, but if I try to start out in 3rd or fourth gear it dies. The intake manifold is cold and sweating. I have adjusted the carb to the specs in the Service manual and even opened up the load adjustment about half a turn more. I need some advice from someone more experienced on these carbs and engines. Like I say I own 2 of these SC's and really like them. I am going to make one just for pulling and the other to restore and use around our property. So any help would be greatly appreciated!!!

Thanks
jimbob09

Had same thing on engine recently. Weak mag with cracked coil.

Sometimes a weak spark mimics a lean mixture. My SC carb sweats until it's warmed up even on warm summer days and in the winter it's pure white frost. It's the nature of the beast.

Check the timing my sc did the same found it had backed off a couple degrees.

The first thing that I would check is the governor. If the governor is working properly, I would then check the acceleration circuit in the carb. I would loosen the throttle lever and run the speed up and down quickly. If it doesn't tolerate this, then I would remove the main jet and check the acceleration holes. If it will quickly respond to throttle movements without a problem, I would then check the intake/exhaust manifold for internal leaks by backing off the tappets to close the valves and pressurizing the intake side. If there is a noticeable hiss in the exhaust side, then you have found your problem.

Some sweating on the outside of the intake manifold is normal, especially in humid or cold conditions, and before the tractor has warmed up.