Coil should be held on the saw with 2 torx t27 size screws. These will resemble a star. Remove the 2 screws, lift out the coil. The small wire should be attached with a spade connector, slide the spade off with needle nose pliers. Disconnect the spark plug wire from the spark plug, & thread it out of the saw as you remove the coil. Assembly is reverse order of removal. For clearance, loosen coil screws, alike coil away from flywheel