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Old 01-02-2021, 07:16   #1
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4.108 flywheel

Iím trying to set new tachometer I donít know how many theeth are on flywheel. Itís a 1976 Perkins 4.108.
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Old 01-02-2021, 08:08   #2
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Re: 4.108 flywheel

It sounds like you are too far along to substitute a different sender, such as a magnet glued to the flywheel. That said, is something stopping you from counting the teeth? You must have at least a small window on the flywheel in order to mount the optical sender. Paint one tooth white, be sure that the engine cannot crank, and use a breaker bar to turn one revolution back to the white tooth. Am I missing something here?
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