Small Engine Troubleshooting Problems? Ask a Mechanic Now.
If you remove spark plug and ground it, do you have spark? Is spark plug wet? Is the solenoid in the carburetor clicking when you turn on the key?
If wire is off solenoid, or it has lost voltage, it shuts off the main jet in carburetor.
In the carburetor is an electric solenoid,it has to open the main jet in the carburetor , or engine gets no fuel to the cylinders. It should have an audible click when you turn the key on. Listen for the click as you turn key on and off. To check the spark , the metal part of the plug has to be grounded to the metal of the engine, while you crank engine.
What is the engine make and model? With no spark to either plug, It can be a problem with the kill wire from switch to coils.
I doubt plugs will be problem, but get two right ones!