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December 21, 2018 at 8:04 pm
#160898
According to reference info that I have your condenser (capacitor) 399-123 Scintilla is rated at .17 to .21 microfarads. You can use any capacitor in the size range. Modern electronic condensers work good. Or any of the Merc Scintilla mags use the same cap. , the Mark 20 about the most common. On the OMC side, the Big Twins 51 – 56 ( pt 171471) use .20 mf cap.
Hope this helps
Joe B