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Mufp 0505 Ign 2 Z

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This is a typical Autolite single-point distributor. It has a conventional vacuum-advance unit that is adjustable. Original equipment vacuum-advance units used shims against spring pressure to control the rate of advance. Replacement aftermarket vacuum-advance units are adjusted via the vacuum port with an Allen wrench.
Ignition System Basics

 This is a typical Autolite single-point distributor. It has a conventional vacuum-advance unit that is adjustable. Original equipment vacuum-advance units used shims against spring pressure to control the rate of advance. Replacement aftermarket vacuum-advance units are adjusted via the vacuum port with an Allen wrench.  View Related Article

 

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