I put another carb on the 1000 and while it ran better, it's clear that the governor isn't working. It overspeeds and does not respond to the throttle as expected (won't return to idle) I'm still getting fire out the exhaust, so either it needs a valve job or the exhaust valve is sticking. The engine is coming out of the tractor and will be overhauled. Stay tuned for what I find as I disassemble this engine.
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