Kawasaki FC420V Won't Start

[gsehntr]

I am working on a riding lawn mower that has the FC420V Kawasaki engine that won't start. When turning over the engine, it acts like it is out of timing. I have spark, compression and the flywheel key is installed correctly and not broken. When I add fuel to the carb, the engine tries to back fire through the carb.

Any ideas?

[Restrorob]

Check the valves/push-rods and adjustment;

[gsehntr]

I adjusted valve clearance, one valve was at 8 and the other at 10. They are both at 6 now. Still doing the same thing????

Checked fuel and cleaned carb....

[I MOW ALONE]

throw a new plug in it i have had a plug give spark but do the same thing threw a new plug in and all fixed. these kaws are funny like that from my experience with them.

[gsehntr]

What does the ignition trigger do for the system??? I will throw a plug in also.

[Restrorob]

The trigger/igniter/control module tells the coil when to fire, In most all cases when this fails it stops firing all together.....

[gsehntr]

Just to let everyone know, I replaced the ignitor and coil, still didn't fix it. The spark plug replaced it and all works great. God Damn spark plug anyway????

[I MOW ALONE]

I knew it.why did'nt you try the plug first? Only a couple bucks.

[Restrorob]

Originally Posted by I MOW ALONE

why did'nt you try the plug first?

Guess I stuttered in post #6.....