Ignition coil and condensor for small(er) engine. Kinda like so:https://www.greenpartstore.com/John-Deere-Ignition-Coil--HE166-0772_p_12979.html

Edit to add: or more exactly like so:https://www.amazon.com/IGNITION-Replaces-166-0648-166-0772-166-0804/dp/B0799HQQHR/