I have a 5 hp Flambeau, but haven’t started on it yet.
I believe they have Eisemann magnetos. Some of those
magneto coils can be replace / adapted with other brand
coils. Condensers just need to be the correct mfd rating,
and physically fit, usually not a problem.
I’m not sure if there’s current a Special Interest group leader
for the Flambeau outboards, but believe there’s a link
on the homepage to see.
I’m interested myself on what’s under the flywheel.
If you have your apart, photos would be very helpful!