Kohler K321 14hp charging system

blpdbp · Jul 23, 2012

PLEASE PLEASE HELP ME!!!!

I AM GETTING 0 TO NEGATIVE VOLTAGE OUT OF RECTIFIER

STATOR RESISTANCE .6 OHMS

NO RESISTANCE BETWEEN STATOR AND GROUND

OUTPUT OF STATOR WHEN RUNNING is ABOUT 26 VAC (LIGHTS UP SEALED BEAM VERY WELL ON LOAD)

TRIED 3 RECTIFIERS, ONE BRAND NEW. ALL HAVE ZERO TO NEGATIVE VOLTAGE OUTPUT DC. on B+ terminal without connection off terminal B+

DRIVING ME NUTS

PLEASE HELP

[email protected]

El Toro · Jul 23, 2012

I think you still have a bad rectifier. Hal

Dave in Tx · Jul 23, 2012

Change the stator. I had one doing that and after putting a new rectifier on it still no charge. Put a used one I knew was good and still no charge. Changed the stator and all is well.

kito169 · Jul 23, 2012

put your volt meter on ac volts. Start the engine and rev the motor up. touch the test leads to the end wires on the rectifier. If you are reading 40 to 60 volts the stator is good. The magnets came loose from the inside of the flywheel on mine. A new flywheel cost me $180. no one would glue the magnets back on. The spacing and polarity have to be perfect, I was told.

Brian Jasper co. Ia · Jul 23, 2012

You need battery voltage at the battery terminal on your regulator. Without it, the regulator doesn't turn on. Run a wire direct to the regulator from the battery and see it it works.

Ken Combs · Jul 23, 2012

Verify your test setup. The regulator must be connected to the battery and well grounded through the case. Make sure those items are taken care of, rerun the test and get back to us.

Any measurements taken without battery voltage present and a defective ground are erroneous.

IA Roy · Jul 23, 2012

Make sure you can get power thru the ignition switch. I had the same issues. A new switch cured it after I bought a new regulator/rectifier.

dondeereb · Jul 24, 2012

had the same problem with a jacobsen tractor with a kohler engine
i had just purchased used. check your ignition switch, they have
two types, one for auto type ignition and one for mag type. if you
have the wrong switch on it or the right one you have is defective
there is no way it will charge.
good luck.

JDseller · Jul 24, 2012

You need three things to make this system to charge.
1) Stator output between 24 and 30 volts AC checked across the wires from the stator.

2) The regulator/rectifier has to be well grounded. The engine has to be grounded to the frame as well. ( Had one giving me fits until I found a bad engine ground strap.)

3) Battery voltage at the middle terminal on the voltage regulator. One volt lower than the battery is the max for it to work.

You did not tell us what the motor is being used on. I am most familiar with them on the older JD lawn tractors. The biggest cause of charging trouble was either the key switch being bad or the plug on the back of it corroded where the voltage regulator did not get battery voltage.

I worked on these things for many years I only saw maybe one or two bad stators. Never had a flywheel bad. Switches where the most common issue and then regulators after them.

Kohler K321 14hp charging system

blpdbp

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El Toro

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Dave in Tx

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kito169

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Brian Jasper co. Ia

Well-known Member

Ken Combs

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IA Roy

Well-known Member

dondeereb

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JDseller

Well-known Member

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