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Groundsmaster 120 rough idle

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#1 Born OFFLINE  

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Posted June 07, 2016 - 01:13 PM

First time to this forum...In need of help here

I have a 1999 Toro Groundsmaster 120 with a Kohler CH20 command pro engine. It recently started missing and idling rough. I drained the tank, went through the carb completely and cleaned it. Still missing and rough idling. I then tested for spark on both sides, and both get spark. The engine will run with one spark plug wire removed on one side and the other.

But when I run it, it still does not fire properly and sounds like it is missing. The fuel pump works fine, and the carb selonoid is functional. What am I missing?

Thanks for any advice you can spare!

#2 boyscout862 OFFLINE  

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Posted June 07, 2016 - 06:28 PM

Welcome to GTT. If fuel and spark are fine, that leaves compression. Is the compression good?  Download the kohler manual from our Manuals Section and follow the troubleshooting guide. Good Luck, Rick