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Just picked up a 1993 arctic cat 580 ext, it’s running on one cylinder. One spark plug looks normal other looks brand new even after running for a bit, I tried putting the plug wire from the good cylinder on the cylinder that’s not running but still nothing so I think that rules out bad/no spark, I unhooked the fuel line from the carb on the cylinder that’s not firing and it’s spraying fuel, I took the carb off and pulled it apart there was fuel in the bowl and the jets are not plugged so I don’t know why this cylinder is not firing I checked compression and they both have 95psi. Anyone have any ideas on why this cylinder isn’t firing?
 

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Pull the plugs out and hook up to the plug wires set them on the head and pull the sled over amd see if there is spark on both plugs make sure they are grounded to the engine by touching the head.
 

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Check all easy stuff.
Plug not firing have fuel on it when you check it?
95 psi is low , imop.
You have service manual?
580 have issue with magnets on flywheel cracking. Causing issues with timing.
 
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