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February 9, 2025 at 12:25 pm
#294002
Capacitor Voltage rating is only a minimum number the part can tolerate. You can use a capacitor rated anywhere at or above that number. I don’t know the minimum for these magneto ignitions, but I think any capacitor rated at 600 Volts or higher would be OK for the maximum voltage spikes encountered at the primary side of the coil. Crosbyman’s recommendation of .22 uFd is good.
It’s a good idea when substituting capacitors that can’t be clamped or screwed down to attach them to the mag plate with silicone cement so they don’t vibrate until their lead wires break off.
Dave