hello i have a 80s or 90s something mercury mariner 115 my qustion is can i sawp coils to see what one is bad and can somwone tell me how thes coils work like one wire from a coil to a diff spark plug
no one has answered b/c you did not provide any useful information. And 80 or 90's 115 are two different animals. Find the year and tell us what your symptoms are and we'll go from there. How do you know it's the switch box?
