Kohler running rough- strange symptom


Old 09-19-16, 05:21 PM
Thread Starter
Join Date: Sep 2016
Location: United States
Posts: 2
Kohler running rough- strange symptom

I have a Walker z-turn mower with a Kohler Command 25HP not sure of the year but about 2000. It is running rough, like only one cylinder was firing (it has two). So to check that theory, I disconnected spark plug wire on cylinder one, and it ran smoother. I then re-connected that wire and disconnected cylinder two spark plug wire, and it ran smoother. So disconnecting either spark plug wire makes it run smoother, although, of course with less power.

Why? Is this an effect of the spark control module going bad? It doesn't have points.
Sponsored Links
Old 09-19-16, 05:40 PM
Join Date: May 2006
Location: Iowa!!!!!
Posts: 3,728
If it has separate coils the kill would likely have a diode to keep the kill circuit from providing a cross firing of one coil to the other. The diode could be bad.
Old 09-19-16, 06:43 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,818
I'd start with new spark plugs. When you say spark control module, I assume you mean the S.A.M.? I don't think I've ever had a SAM that was bad to give me symptoms to go on.
Old 09-19-16, 07:10 PM
Join Date: Jan 2011
Location: USA
Posts: 4,185
When's the last time the carbs. have been rebuilt?
My 27 HP B&S was doing the same thing, replaced plugs, new fuel filter, added Sea Foam, no change.
Had the carb's rebuilt and it runs like new.
Old 09-19-16, 07:56 PM
Thread Starter
Join Date: Sep 2016
Location: United States
Posts: 2
Yes, I meant the Spark Advance Module.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes