It’s been a long time since I’ve been on AS. The reasons are good...no excuses.
For my Husqvarna SG-13 stumper I have disassembled the engine for service including finding a missing wire for the Kill Switch. If you plan to work on one of these especially the coil here’s a suggestion to save time and work. First loosen the three bolts/nuts of the right fender but keep the front bolt barely fastened so you can swing the fender outboard and forward to get the flywheeel cover off. The Honda GX390 engine has a unique spark plug/coil wire plug Cap. It houses a slotted (screwdriver) threaded brass piece holding a small fuse and compression spring inside. After cleaning with CRC Electrical Parts Cleaner continuity tested good. This 250 lb. stumper with Green Mfg. #500 carbide teeth has been a great workhorse even though it is not self-propelled.