View Full Version : Kawasaki FC420v trouble

Homedelight Man
05-20-2007, 05:36 PM
First post for me. My brother is having trouble with his Exmark walk behind, with a Kawasaki FC420v engine. When trying to start it backfires through the carb and the muffler. I pulled the plug and grounded it and the spark looks nice and blue. We drained the gas and put fresh in. I have pulled the flywheel and the key is good, also the magnet seems strong. I also removed the head and the valves and cylinder wall looks good. I am stuck thinking it may have a faulty coil? Has anyone had a similar problem.

Thanks, Jonathan

05-20-2007, 06:39 PM
Back firing through the carb. and muffler is a sign of possibly valves too tight/out of adjustment.

Check the valves;


Homedelight Man
05-22-2007, 07:54 PM
Thanks Restrorob, that seemed to fix it. Great help!