MF it is a worry when you get no response with a bit of starter fluid, makes me think straight up that it has been straight fueled. Try a teaspoon of fuel mix down the plug hole and see if you get a reaction. If all this fails pull the head and look at the bore. This is of course after you have checked the spark and tried at least 2 known spark plugs
Last edited by NormK; 16/11/18 08:07 PM.