This is not a lawnmower forum, but as you read the title, i have no spark on my craftsman mower and i was wondering how i should tackle this, i cleaned the magnets the only problem is that the flywheel isnt coming off and i dont have a puller, im thinking about getting a new ignition coil, but i dont know if that will help, if you know how else i can tackle this, please say, thanks.
No spark on my craftsman mower
- Thread starter Blukas
- Start date
External coil? I will assume it is so make sure small wire going to the coil is removed. Then remove spark plug making sure it is not fouled (all black) lay it on top of motor on something metal or get a spark tester. Check for spark. If it sparks then reconnect kill wire and see if it still sparks if not then kill switch is grounding it out if no spark either way looks like bad cdi.
the kill wire goes from the coil to the throttle lincage. Unplug it from the coil and check again for spark. If its sparking but not running right its most likely going to be the flywheel key sheered. you can check it without pulling the flywheel just unbolt the nut and washer and you can see the keyways aligned.
I tried, i sprayed every grease and cleaner in my garage to try to get it penetrated, then used the hammer, but it never came off, its most likely stuck from the rust, but i garentee that it was the kill wire because i was wondering why half of the assembly was moving, but the other side didnt work which now i feel like an idiot thinking “i guess ill fix that later, right now ill fix the spark problem” i guess a lesson was learned for me, dont think of the worst possibility first.
The kill wire should go from lug on the coil to either carb linkage so when throttle is shut it grounds out spark, or what sounds like your case the flywheel brake which can be on inside of flywheel. You never told us if when you removed kill wire from coil did you get spark. Once we know that answer we can continue debug.
it should not physically drag, use a bisness card to check the gap. you should be able to fit it in with no effort.
after you check that get some electronic specific cleaner (isopropyl alcohol works in a pinch)
and clean all the contact points, check the inside of the spark plug boot to see if its corroded ( it wouldn't hurt to clean it)
now, if you still have no spark, it could be that the cdi is bad. as ole4 said, cheap ebay ones will do the trick
after you check that get some electronic specific cleaner (isopropyl alcohol works in a pinch)
and clean all the contact points, check the inside of the spark plug boot to see if its corroded ( it wouldn't hurt to clean it)
now, if you still have no spark, it could be that the cdi is bad. as ole4 said, cheap ebay ones will do the trick
