I need a little help diagnosing my engine. It's a kohler532. It started back firing out the exhaust while mowing a few days ago but still ran ok otherwise. Now it back fires out the exhaust and intake runs like crap, missing and backfiring. I replaced the points, condenser, and plugs all of which looked ok. Getting compression of 120 on one cyl and 125 on the other. Runs the same (bad) on either cyl with the plug wire unhooked.
Any help sure appreciated.