Are we talking about the outside magnets (for the ignition coil) or the inside magnets (for the stator)?
Bert, give me the model and spec numbers off of one of your Kohler engines and I'll contact Kohler about it.
The motors are all out in customers mowers resplendantly wearing their nice new $ 700 flywheels.
Kohler have been using the same flywheel casting in all their engines for a very long time.
The only difference inside is the size of the center hole and the size and number of alternator magnets .
Externally they get either 1 magneto magnets & a counterweight ( singles) or 2 magneto magnets & no counterweight ( twins) .
Command , Triad & Magnum engines have a forged crank which because it is stronger is smaller than the thicker , heavier , cast crankshaft used in the courage series.
This is why the Courage engines develope the "Kohler Krack" in the crankcase adjacent to the exhaust cam.
All the dead flywheels come from CH18's (ex Cub Cadet ) or CV18's ( ex Great Danes ) & a CH23 ( ex skid steer) .