Kohler K series

[Vernon in Ks]

Working on a Kohler K series motor. Here's what I know. #1Rectifier is bad. #2 Stator has been changed from another motor. #3 serial # unknown.
Is there a way to match stator and rectifier? Are all stators the same visually? Any good help appreciated. Thanks
 

[Tom Arnold]

Stators come in different amperage ratings. You need to determine if the stator you have is OK or not.

Get your hands on an ANALOG MULTI METER.

Begin by using the OHMS scale. This determines resistance.

Disconnect the stator from the regulator. Put one lead from the meter to each wire coming from the stator. You should see the needle of the meter swing right across the scale.

If that does not happen, then check the meter by touching the two probes together. The needle should make that swing to the other side.

If the meter did make the swing both times, then touch one probe to the engine block where it can make a good ground. Then touch each wire coming from the stator, one by one. The meter should not move. If it does, then the stator coil is shorted to ground and a replacement is required.

If the stator checks out OK that way, then you need to change the meter setting to AC VOLTS on the lowest setting. Start the engine and put the probes across the two stator wires again with the engine running at half throttle or better. You should get a reading of 24 to 28 Volts AC. If you do, then there is nothing wrong with the stator.

Plug in the rectifier. It should have a metal case somewhere and that case is NEGATIVE. It should also have another wire coming out of it. That lead is POSITIVE. Switch your meter to DC VOLTS - lowest setting. If you have the meter leads plugged in correctly, then touch the RED meter probe to the wire coming out of the rectifier and the BLACK meter probe to the metal case. You should read about 13.6 Volts DC. If you don't, then the rectifier is most likely kaput.
 

[Vernon in Ks]

Tom Stator is good just don't know amperage. Does the rectifier have to match the stator? Parts book shows several different numbers.
 

[El Toro]

Here's a wiring diagram for some Kohler engines.
Hal

 

[Tom Arnold]

Check out section 8, pages 10 thru 17 in the link below.
Untitled URL Link

 

[joe csuti]

As tom said stators were avail in several different amp outputs on the K series eng,10A,15A & 25A,the 10A was standard on most eng,unless specified different by equip mfg,the different pn for reg is due to current rating of each & also due to the fact the ac output voltage on 10A stator was different from 15/25A reg,10A stator the ac output is slighty over 20V,on 15/25A stator min output is 28V ac,the internal circuits of reg are slightly different,the 15/25A reg might/might not work on a 10A stator.Best you can hope for is id by ac voltage output or possibly finding a pn on stator.
 

[Tom Arnold]

I am not disagreeing with what Joe said but the link I gave you should be of great help because the various stators are depicted very accurately. Look at those pictorials carefully. There are distinct differences in the construction of each amperage and you should be able to match your stator to one of them.

Kindly let us know how you made out with this.
 

[retired farmer]

Give Kohler a call. They can help you with what you are looking for. Phone number is on the internet under Kohler.
 

[El Toro]

Call Kohler direct at 1-800-544-2444. Hal
 

[Vernon in Ks]

My book didn"t have those pics. That was exactly what I needed Tom. Thank you.
 

[t.r.k.]

Vernon,

What everyone said is correct about there beinge different amp systems. However, I am thinking that there is only one replacement Kohler regulator, at least for all the late stuff. I have put it on K series with no problems. I can't remember the part number but it ends in 10. And it replaced the one ending in 09 that in my opinion was a better regulator.

The only thing to be aware of is that if the charging circuit is directly connected to the battery when the ignition switch is off the regulator ending in 10 will kill the battery in about 2 weeks. (Found this out when replacing the 09 version) Most manufacturers run the charging circuit through the ignition switch so this is not a problem.
I have installed a relay in the charging circuit so that there is no connection to the regulator until the ignition circuit is switched on to solve this problem.
 

[sflem849]

Why is an analog MM the only acceptable meter?
 

[Tom Arnold]

I prefer the analog MM's because the low cost digital ones seem to
"hunt" all the time. Therefore, if the meter does not settle on a
certain reading, you don't really know what the reading is. Since
most guys don't need an expensive MM for their shop, they are
more likely to choose a cheap digital model over the analog one
just because we are living in the digital age.

i prefer to recommend tools that I know will work for people for the
task at hand. YMMV