On Sun, 14 Nov 2004 12:20:28 -0800, Lloyd Sumpter
wrote:

This is something I suspect: the choke may not be hooked up (or adjusted
properly?) With other engines, I could usually STOP the engine by pulling
out the choke when it's warm. But in this one: no change whatsoever.

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I think that is your problem, it should stop immediately. Can you see
the choke linkage move with the engine cover off?