Removing power resets the computer, and now it thinks the engine is brand new again. When the engine doesn't want to idle after a reset, there is probably gunk on the throttle plates, throttle body and idle air control passages. It wouldn't hurt to clean those.
Idle speed is controlled with bypass air through the throttle body, controlled by the idle air control valve (IAC). Gunk collects restricting this air flow, and idle speed. You might try slightly pushing the throttle to raise idle speed above normal, then slowly let off to see if the computer takes over, then let it idle on it's own for several minutes to relearn.
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Today's Featured Article - History of the Cockshutt Tractor - by Danny Bowes (Dsl). The son of a very successful Toronto and Brantford, Ontario merchant, and himself quite an entreprenuer, James G. Cockshutt opened a business called the Brantford Plow Works in 1877. In 1882, the business was incorporated to become the Cockshutt Plow Company. Along with quality built equipment, expedious demand and expansion made Cockshutt Plow Works the leader in the tillage tools sector of the farm equipment industry by the 1920's.
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