Small Engines (Lawn Mowers, etc.): Kohler K532 Charging, stator, flywheel

Question
Hi Eric, I have a John Deere 400 with a K532 engine in it.  I rebuilt the engine last year and found one of the magnets on the flywheel had came off.  I reattached the magnet and when I checked the voltage coming off the stator after rebuild I only had around 12 volts.  I took the engine back out last week and put a new stator on thinking this would fix the problem.  After changing the stator I am only getting around 15 volts AC at full throttle.  I checked each stator lead to ground and it was open.  I checked resistance on new stator and it was around .4 ohms.  Could it be the gap between the stator and flywheel? Thanks for helping

Answer
Possibly.  Does the engine have a regulator?  I can only one other engine where a magnet came out.  I tried epoxy to re-glue the magnet but it did not hold.  Needless to say I had to eat a heafty repair cost because I had to replace the customers flywheel and stator for free.

I would highly recommend replacing the flywheel if you plan on keeping the mower for several more years.  You could also try to locate a used one but it may have the same problem.

Let me know if the engine has a regulator.
Eric