You don’t quite have it yet but I think I can get you there.
We thing alike as far as the cam knowing were the pistons
are but you can’t dismiss the points. Its there location that
determines when the spark will occur relative to the pistons
location in the cylinder. Retarded, advances, TDC, -“Timing”.
This magneto and distributor both control the “Timing”
the same way except for ——-
.
How the points are moved.
.
Disregarding the mechanical advance as it controls the rotor.
Tubs
.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.