Kohler Command 25 charging system problem

[rhajicek]

I have a Kohler Command 25 Model CV25S, and I just tested my stator and voltage regulator.

The problem is that the mower runs fine until I'm I've mowed about half an acre, and then my 20 amp fuse on the charging system blows. If I replace it immediately it will blow again. If I let the engine sit a day it will run again as before until it blows the fuse.

Note that I just replaced my positive battery cable with a brand new one ... the old one was old, weak, and corroded. Even after replacing this, the charging system acted the exact same as before ... 1/2 acre and then a blown fuse.

My test results:

Battery tested after key turned on: approx. 12v DC.
Battery tested while engine running fast: approx. 14.5v DC.
Ohm test on stator AC wire to AC wire: <1ohm
Ohm test on stator AC wires to ground: infinity
Voltage Regulator AC wires coming from the stator tested to ground: approx. 25v AC.

My thought is that the voltage regulator goes funky after it gets warm.

To fully test this I'd probably have to mow until it blows the fuse and then test it again, but if you all have any input on this diagnosis it would be much appreciated, especially if there are any other tests I can run to verify things.

THANKS!

 

[mechanic mark]

Kohler Engines: Owners and Service Manuals: Manuals and Maintenance enter engine model number, click on service manual

If this is on your Simplicity post 7 digit model number please, thanks.

Results Your Simplicity model number, owners manual & illustrated parts list.

 

[rhajicek]

Do you mean the model # of the mower, or of the engine? Neither are 7 digits from what I can see.

The Simplicity: Stallion ZT2561 (a year 2002 model, i think), made by Ferris.
The Kohler: Model #CV25S, Spec #69557, Family: 2KHXS 7252GC

I tried the website you gave, but it does not accept my engine model #, which is the only model # on the engine label ... there's nothing more than that.

Also, in the "I don't know my model #, it does not list the "Command" series without the Pro ... my engine owner's manual does not say "Pro", so all I can conclude is that they have either dropped these older engines from their website, or the website never included them due to its newness. I tried the "Command Pro", but it didn't list my engine model.

 

[ILENGINE]

Do you mean the model # of the mower, or of the engine? Neither are 7 digits from what I can see.

The Simplicity: Stallion ZT2561 (a year 2002 model, i think), made by Ferris.
The Kohler: Model #CV25S, Spec #69557, Family: 2KHXS 7252GC

I tried the website you gave, but it does not accept my engine model #, which is the only model # on the engine label ... there's nothing more than that.

Also, in the "I don't know my model #, it does not list the "Command" series without the Pro ... my engine owner's manual does not say "Pro", so all I can conclude is that they have either dropped these older engines from their website, or the website never included them due to its newness. I tried the "Command Pro", but it didn't list my engine model.

Use CV740 instead of CV25 and then use that manual. It will be the same manual as your engine. Kohler changed the model number from a HP type number to a CC type number, and can be confusing sometimes.

 

[rhajicek]

I don't think I would have ever found that. Thank you!!!