Small Engines (Lawn Mowers, etc.): John Deere 345, john deere 345, ac volts

Question
Hello, I have a 2000 John Deere Model 345 with a 20 HP Kawasaki water cooled engine.  I thought the battery was bad (dead) so I purchased a new one but it seems I was wrought about it because the charging system isn't keeping the battery charged.  After I charge it up it starts and run fine but I'll notice as the unit sits in the garage the charge dwindles down to nothing in a few days.  Got any ideas?

Answer
Kurt

Common problems with battery's not charging are bad battery rectifier,Low engine speed or excessive idling.Battery cables and terminals dirty.As far as the battery's losing power you have a fault that is discharging the battery. From your Description it Sounds like the Stator/Charging Coils or the Voltage Regulator (if Applicable) may be Bad and Require Replacing.For Testing and Identifying the Electrical (Charging) System on Mowers you can Use this Site Addy; http://engines.myfaqcenter.com/Answer.aspx?p_faqid=3438 and Use the Link for AC Volts/DC Amps Meter Setting Chart. This is for Briggs Engines and Works Well for Kohler, Kawasaki, Tecumseh and Other Engine OEMs.