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Rob, "A few years back" is what you're saying how long its been since the engine was run. Even a couple or years is enough time for an engine to freeze up. Hopefully you didn't do any damage to the liners or rings when you cranked it over. Hindsight says you should have removed the spark plugs and added some oil to the cylinders. Try doing that first--spray some penetrating oil into each spark plug hole and let it sit a few days. Then remove the starter so you can get to the flywheel. Try prying the flywheel up and down with a large screwdriver or a crowbar--be careful not to damage ring gear teeth. Don't put a whole lot of pressure and apply pressure in both directions--alternating each time. It wouldn't hurt either to remove the valve cover and spray some oil on the rocker arms and valves too--then you'll also be able to make sure you don't have any stuck valves. You didn't mention that the tractor was trying to roll when cranking, so I'm assuming the clutch isn't stuck. Did the cranking speed slowing down happen no matter what the clutch position was? Also, it goes without saying that you need a good hot battery and clean, tight connections, etc... Last thing I thought about--hopefully you had antifreeze in the engine/radiator--right?? Down south, many a good tractor has been ruined by folks not spending a few bucks on antifreeze. Since we don't always get what they call "hard freezes", it seems that people don't always bother... That's just a few ideas that came to mind--I'm sure you'll get plenty of advice from some of the other fellows too. Repost with an update so we'll know what you've checked.
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