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Date Posted: - Monday - 09/26/11 - 3:30pm
Author: Bruce
Subject: Perkins 4-107 Idle Speed

The old mechanical take-off for my analog tachometer broke several years ago. I have installed a digital tachometer with an AC signal lead from the alternator. Could anybody tell me what the idle speed is for our 4-107's? (i.e. what sped does your engine idle at?) I would like to calibrate my tachometer.
Thanks very much

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[> around 650 rpm -- Paul M31 #106 NJ, - Tuesday - 09/27/11 - 12:19pm

based on analog/mechanical rpm gauge.

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[> [> RPM -- Bruce, - Wednesday - 09/28/11 - 8:47pm

Thanks Paul. I just bought a photo tachometer. I'll post the results.

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[> [> [> 1000 RPM -- Bruce, - Friday - 10/14/11 - 4:05pm

Verified via photo tachometer. My Perkins 4-107 idle speed.

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