Quick question

[WEEDHOPPER420]

I just got a tach and it measures the spark per revolution of the engine .
My question is how many times does the spark plug fire per revolution on these engines, 1 or 2

 

[cloakedvillain]

2 strokes spark once every rev, 4 strokes once every 2

 

[WEEDHOPPER420]

I thought as much thanks

 

[GW's Motorized]

2 strokes spark once every rev, 4 strokes once every 2

Most four stroke still fire every revolution. They will fire on yhe exaust stroke to burn off extra fuel

 

[ImpulseRocket]

Most four stroke still fire every revolution. They will fire on yhe exaust stroke to burn off extra fuel

Only on a wasted spark ignition, something not very common on 1 cylinders.