The coils were aftermarket, but 3 bad ones seems a little unlikely! The magnets in the flywheel will attract a screw driver.How would I tell whether they’re too weak or not? I did take it to a repair shop and they told me what I already knew.No spark! They seemed to think coil but that was all I got from them. I’m hesitant to order an Echo coil ($70-80) without knowing that is the issue.