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Re: tachometer mystery?
The air conditioner provides an additional load which slows down the engine. Many engines have an idle solenoid that will engage when the A/C is on. This solenoid will attempt increase the speed of the engine. Depending on how it is adjusted, it may or may not cause the engine to speed up.
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Gordon Burlison - Mentor
662/Rocky Mountain Robotics
"Every silver lining's got a Touch of grey - Robert Hunter"
"No sense in being pessimistic, it wouldn't work anyway"
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