So I have a pair of Honda HRC216HXA. One 'for parts', the other better then 'for parts'.
They are such heavily built mowers I figure it's worth trying to get one going in the event I actually have grass (see https://www.mylawnmowerforum.com/for...otherwise.html
I spun the good one with the plug out, grounded to the block and it had good spark. I squirted some gas in the cylinder, put the plug back in and pulled. It started and ran for a bit so I'm off to the carburetor. The carb had been replaced w/ the wrong one (I am not the first to work on this), so I got an Ebay carb and put it on. A little hard starting but with persistence it ran good and strong.
Ran for a time (3-5 min) that is, then died. let it sit, tried again, ran, stopped. repeat.
Then it died and wouldn't start again.
Of course that's not all the story, in between these short runs I've been working on the clutch section. When it ran it had a nasty bearing howl so I figured I'd get the clutch bearing and break bearing off to make sure they aren't fried (they are). To work on it I lean it on it's side (oil dipstick up).
At this point I have the blade, drive clutch and break disc off so there's just a shaft sticking out the bottom. The recoil starter is off, so I'm spinning it w a drill. I remove the plug, remove the kill wire, ground the plug to the case (all just like before) and NO SPARK.
I tried a new spark plug, NO SPARK. (I read that marginal plugs can stop sparking when they heat up)
I swapped the coil from the 'parts mower', NO SPARK.
I've read that's it's rare for Honda coils to go bad, but I have two bad coils?!?! (granted they are no where near new)
At this point, what I'm testing is a coil (cleaned mounting points) on an engine connected to a new spark plug, spinning a (cleaned) flywheel with a magnet that attracts metal. Seriously, what else do you need to induce an electrical flow, a magnetic field passing through a coil. But still NO SPARK.
I ordered an Ebay coil, what could be the harm? But I'd like someone to tell me I'm not crazy.
That yes, if you have a good coil, gapped right, and you spin a magnet past it you will get spark.
What else could it be?
Thanks in advance.