Not Firing

[rollercoaster]

"1993 Mercury 40 hp 4 cyl. not

"1993 Mercury 40 hp 4 cyl. not firing, replaced switchbox, still not firing?????"

 

[ibnfshn]

Temporily disconnect the black

Temporily disconnect the black/yellow wire from the switchbox and recheck for spark. If you now have spark there is a problem with the kill circuit or ignition switch.