Small Engines (Lawn Mowers, etc.): Kohler Command V twin running rough, allmand brothers, v twin

Question
I recently bought an '99 Allmand Brothers backhoe with a Kohler Command V twin, 25 hp. It ran for awhile, very roughly so seller bought a carb and I installed it. It will only run with the choke fully out and even then still very rough and barely. In troubleshooting I found that one of the cylinders is not hitting. It seems to have compression, but when I pulled the plug wire to determine if it was hitting, when I put the wire back up to plug with it running, I did not see any spark. I had removed the plug and grounded it and the spark was very weak, almost not there at all. So my question is what should my next step be. Any help would be great. thanks

Answer
Hello Perry:

>>First, Change the Spark Plug.
>>Second, Check the Coils.
>>Remove the Spark Plugs and Wrap the Threaded Section of the Plug with Wire, then Attach the Other End of the Wire to the Engine Block.
>>**First Make Sure the Plastic End that Snaps to the Plug is Allowing Current to the Plug. Use a Test Light or Multimeter and Check for Fire Behind this Connector (through the Large Rubber like Coil Lead to Plug) for Fire to the Plug whenever there is No Fire to the Plug.**
>>Once you are Sure the Coil Lead and Ends to the Plug are Not the Reason for No Fire to the Plug, then with the Plug Still Wired to the Engine and the Coil Lead Attached to the Plug; Remove the Coil Shut Off Wire at the Shut Off Switch.
>>Check for Fire. If No Fire, then Remove the Cut Off Wire from the Coil (removal of the blower housing required) and Check for Fire.  
>>If the Spark Plugs are Firing with the Plugs Out and Properly Grounded to the Engine, then Replace the Plugs and Start the Engine.
>>Using an Insulated Plug Wire Puller, Pull the Plug Wire from 1 Cylinder. If the Engine Continues to Run, then Replace the Plug Wire and Disconnect the Other Plug Wire. If the Engine Quits, then Replace the Other Cylinders Coil.
>>You can View a Breakdown of the Engine at this Site Addy; http://www.kohlerplus.com/login.asp and Select Enter as Guest. Now Select the Thumbnail of the Engine Catalog you Wish to View.
>>If you Hit a Snag or this Does Not Correct the Problem,  I Hope to be Here if You Require More Assistance. Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Happy. Thanks.

Good Luck

Respectfully

John

PS: I am Allowed to Answer 5 Questions a Day. If you See I am Maxxed Out, then Try Submitting your Question at or Just After 8pm EST (US). My New Day Starts then. Comments and Ratings are Greatly Appreciated. Thanks.

Respectfully

John