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Old 03-29-2002, 10:34 AM
klmklm klmklm is offline
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Join Date: Mar 2002
Location: N. Tex
Posts: 4
Kohler Flywheel Problems

Hello All,
I have an 8 year old CH12 Kohler on a Cub Cadet Rider. Recently it started blowing fuses and I traced the problem to a shorted stator. When I removed the cowling I found pieces of magnet stuck everywhere. When I removed the flywheel I saw the problem. I am pretty sure the magnets to run the alternator must be glued to the inside of the flywheel. Naturally the stator had been destroyed and I am looking at about $200 worth of parts to repair this. Has anyone ever seen this problem before? The engine has been well maintained and not abused. It still runs fine. I can find no evidence of anything that caused this and it would be practically impossible for anything to get inside the flywheel and cause this. I would appreciate any comments, and suggestions. Is there a cheap place to buy Kohler parts? At the suggestion of a parts supplier I have emailed Kohler in hopes of some assistance!

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Old 03-29-2002, 04:18 PM
Jman Jman is offline
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Join Date: Feb 2001
Location: Southern IL
Posts: 217
The magnets are glued on to the flywheel. All engine manufacturers attach the magnets this way. Some things that can cause them to come loose would be high heat temperatures, high humidity conditions which allowed moisture to get between the magnet and flywheel and allowed rust to form. The rust can actually push the magnet off of the flywheel. Just one magnet coming loose can cause the catastrophic failure that you saw.
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Old 03-30-2002, 11:29 AM
klmklm klmklm is offline
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Join Date: Mar 2002
Location: N. Tex
Posts: 4
Re: Kohler Flywheel Problems

Thanks for the reply! I would think that Kohler and other Manufacturers would be able to circumvent a problem like this.
I see no way for heat to be a factor as you have the cool intake air circulating by the flywheel all the time the engine is running.
The mower is kept in a closed storage shed and there is no heavy rusting on the flywheel. Hopefully Kohler will be of some assistance.
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Old 04-01-2002, 02:37 PM
klmklm klmklm is offline
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Join Date: Mar 2002
Location: N. Tex
Posts: 4
FYI. I got the following reply from Kohler:
Hello Mr. xxxxx
Thank you for your inquiry.
This is an unusual failure that we usually see as a result of excess heat,
or by some sort of impact to the flywheel. While this engine does have a 2
year warranty against defects, I will make a goodwill policy adjustment, and
send a flywheel and stator free of charge. Please let me know how this works
for you and of course, if we may be of further assistance . Thanks again!


I guess I can't complain about that!
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