I think the governor is to attempt to keep it from dropping TOO low, and from over-revving.
Think of your car going up a steep hill pulling a trailer with the cruise control on. At some point, it's going to start slowing down in RPM even with cruise on, unless it downshifts, or unless you have a very powerful engine.
John
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61 and 63 Originals
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782D
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102 parts
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