- Jan 10, 2020
The old LawnBoy electronic coils were bad for crapping out if you didn't ground the plug wire if you took it off the plug and cranked the engine. Force (chrysler) outboard engines were bad for it too. Lots of Force outboards got retired because the ignition modules went out and they were NLA. I haven't had a modern coil go out but i am sure if you ran it long enough disconnected it would.I’ve never burned out a coil by disconnecting the spark plug wire to see if both cylinders are firing. Yes, it may happen, but you would have to run the engine for a long period of time before doing damage. Testing this way would take less than a minute.