Dennis, do you have a compression gage and air compressor? And the engine is stuck, correct? You could unscrew the gage, screw the hose into a spark plug hole one at a time, then plumb it up to blow some compressed air down each cylinder, before you take off the head. BUT take the rockers off FIRST to close all the valves.
If you put a tablespoon of oil in the hole first it will help seal the blowby at the rings, and it will help the stuck rings, too. Put a valve in the hose, so you can control the air. Make SURE the transmission is in neutral in case the engine does break free. It probably won't.
Now, listen to where you here air leaking out. Some should come out through the rings, except a really stuck cylinder. Some might come out the valves if they don't seat well. Listen at the exhaust and then the carb. If you've only got modest leakage, look in the radiator and see it you have bubbles. Might help you narrow down the problem to one cylinder. Best Regards, Charlie
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Today's Featured Article - Product Review: Lead Substitutes - by Mike Schordine. Lead was oriinally added to gasoline as an upper cylinder lubricant. It lubes the valves and seats. If you rebuild the motor, you could use hardened seats and valves, and unleaded fuel. But if your old tractor runs good, a simple lead substitute added to the gas is a perfectly reasonable solution. And, if you are like me, your tractor is under cover, but it sits outside. So with every temperature change, the humidity in the air collects in the fuel tank, in the form of water.
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