lol someone didn't read the direction did they? man what an expensive way to learn. there goes another 50-80 bucks. might as well change out the plug and drive it like it owes you money. was that the other way around. never done that before just change the plug and run it. how can you tell an engine is done. some of the symptoms are starts up fine when cold but looses or wont hold a tune after it get up to temps/ acts like its rich after tuning when cold. no power wont idle after it is warmed up w/o glow starter. no compression.