Chris,
I looked at a pick-up (exciter/pulser assembly) and also a flywheel and the
flywheel has 4 magnets.
There is just one pickup on the stator fixed to the crankcase. The manual
wiring diagram and theory of operation (pg 2-26 Ignition System Theory of
operation) backs this up.
Each pair of magnets that follow each other are for the charging and
triggering of the CDI circuit during a 180 rotation. At the same 1/2
rotation, the other 2 magnets are charging when they go by the ends of the
lighting coil.
So the same set of 4 magnets do TRIPLE duty as an alternator, CDI charger,
and CDI triggers.
Thanks for your ideas. I had forgotten all the details myself of how this
worked.
I think he may actually have a broken rod which explains the internal
ker-thunk every rotation along with the the mashed ground electrode.
Just pulling a carb and rubber mount or exhaust manifold should allow a look
to see little or no movement of the piston on that side.
Chuck
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