Running on 1 cylinder

[Dpak]

Hello
Motor running on 1 piston have changed the coil packs and the spark plug and left hand piston still not working I have changed the coil packs from left to right along with the spark plug and legit hand piston still not firing any ideas.

 

[ILENGINE]

Have you removed the valve covers to make sure the push rods are still in place and the valves are opening and closing properly. And the piston is moving up and down when the engine cranks.

 

[outdoorpowermike]

What engine is it? Make, hp?

 

[Rocky J]

Hello
Motor running on 1 piston have changed the coil packs and the spark plug and left hand piston still not working I have changed the coil packs from left to right along with the spark plug and legit hand piston still not firing any ideas.

If it is a Briggs you might also try unplugging both coils kill wires and try it again. Each wire has its own diode in it and they do go bad . It can have spark on both cylinders but one side at the wrong time / open ex valve piston on bottom of stroke .