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wheel horse over charging

A

Anonymous-0

Well-known Member
I have a 1987 414-8 wheel horse with a 3 amp unregulated charing system that over charges how do i check the stator and what should i look for?
i believe it has a 14hp magnum motor
 
What is the charging voltage acroos the battery terminals at 1/2 throttle or better? Should be around 14.0-14.5 volts on a 12 volt system. There's probably a stator in the flywheel that supplies ac voltage to a diode that converts the ac voltage to DC. Here's a wiring diagram that may help. I think the ac voltage should be in the 20 to 30 volt range. Hal
a104771.jpg
 
First thing to do is either check battery with a hydrometer or remove & have load checked,most problems associated with an overcharging condition in an unregulated system are caused by weak/bad cell(s) in battery due to the fact internal resistance of battery changes with charge level & this acts as a regulator for alt output on eng,due to the low charge rate(1.5A-3A)and the fact alt is always charging battery this tends to shorten life of battery in the long run.

If battery checks out ok & you suspect system overcharging due to a constant hi current/voltage reading on dash meter(if tractor has)then problem may be a shorted inline diode on alt output or a problem in alt stator,goto link below & download service/repair manual(free download)for magnum eng in section 8 of manual it will tell you how to troubleshoot 3A charging system.
magnum
 
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