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the capacitor must be potted up in the stator, as it’s not there and does not show on the parts list or exploded view.
Q: are you saying the capacitor has been taken out ???could you replace it with one mounted anywhere it can fit. I suspect it would not even have to be under the fw as long as it can be wired to whatever it is protecting or unloading into.
docs refer to a . 5uf 800v cap . of phase maker ignition .
What I’m saying is that there is no capacitor, and the parts list does not show one, so I’m assuming it’s potted up with the rest of the ignition stator electronics. The green (+) wire to the coil that would be connected to the capacitor comes out of the underside of the potted electronics portion of the stator. The white wire to the coil (-) comes from the white insulator on the points, so the points ground that wire, completing the circuit when they “make”.
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No capacitor shows on the parts list or exploded view in the link below. (I hope I put the link in right – I haven’t posted a link here for a long time)- am I missing something? Maybe the capacitor was moved out of the potted stator area a year or two later to make it replaceable without replacing the whole stator electronics assembly. There are no signs of any way to mount or wire a capacitor like other old Mercs have.
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I just downloaded the shop manual and for this 1970 motor, it has the Thunderbolt Ignition, not the Phase Maker. It shows the Phase Maker came in 1971. My Thunderbolt is on shown on pages 3D-29 and 3D-30, except one set of points since it’s a one cylinder.
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https://www.marineengine.com/parts/mercury-outboard-parts/40-1-cyl/2498136-thru-3296136-usa/flywheelstator-and-ignition-coil-40