Hey guys. This no spark thing is interesting. I've had this issue twice with the same mower and once on my Victa 160 go kart engine. My mower is a full crank victa utility running points and a g3 carby with no kill wires the moment and I've found that when I've had no spark, I've pulled the flywheel off and slid the coil closer to the flywheel magnet. Simply bend that little tab that's on the prong the coil sits on, slide the coil forward so that it is sitting perfectly flush with the end of the prong, then bend the tab back making sure the coil hasn't slid backwards, then get some thin cardboard like from a wheetys box and cut out a smallish square out, enough that you can fold it up a few times so you can use it as a chock at the back of the coil to stop it from moving back away from the flywheel magnet. You want that coil as close as possible to the magnets. I've solved no spark issues 3 times simply by getting the coil further forward. Now in the events of no spark, that's my go to thing when starting the process of elimination. Hope this may be of some help. If anything I've written is confusing, I'm more than happy to take a picture of what I've done to show you, as sometimes the picture is definitely worth the thousand words. Cheers