No spark on my craftsman mower

#22
The kill wire stops spark. Once you unplugged it the cdi will always spark if flywheel is rotated fast enough. How exactly are you testing it for spark. Also post a pic of spark plug electrode end.
 
#28
Put a pry bar in a safe place between block and flywheel. While prying outward TAP rapidly on flywheel away from magnet side. With patience, I guarantee it will come off . Its never failed me yet. The key is rapid light tapping. It is the same principle as an impact wrench.
 
#32
BTW I had that exact lawn mower and it would fire but die. Spray starter fluid and it would run until spraying stopped. Put a new carb on and same thing. finally out of frustration I put a small hole in the gas cap thinking maybe it was vacuum locked and sure enough it started and ran like a champ.
 
#33
BTW I had that exact lawn mower and it would fire but die. Spray starter fluid and it would run until spraying stopped. Put a new carb on and same thing. finally out of frustration I put a small hole in the gas cap thinking maybe it was vacuum locked and sure enough it started and ran like a champ.
Thanks for the advice
 
#34
And also, is there anyway to fix a bad ignition coil? Cause i dont wanna spend 20 dollars on a new part when i can temporarily fix it for free
 
#35
You can try the toaster oven trick. Put it in the toaster on 200 degrees for half an hour or so . Another trick is to spin the engine to around 2000 rpm with the plug wire disconnected and ungrounded. Use a regular drill not an impact on the flywheel nut. Many people dont know but you should never do that on a working coil because it can fry them. they should always be grounded when turning the engine over. But since its broken that sometimes fixes them
 
#36
You can try the toaster oven trick. Put it in the toaster on 200 degrees for half an hour or so . Another trick is to spin the engine to around 2000 rpm with the plug wire disconnected and ungrounded. Use a regular drill not an impact on the flywheel nut. Many people dont know but you should never do that on a working coil because it can fry them. they should always be grounded when turning the engine over. But since its broken that sometimes fixes them
Does it have to be a toaster oven or can it be a regular oven?
 
#39
The only way to accurately test for spark is to use a spark tester. It tests without damaging the coil, and it tests in a vacuum environment. They really are worth every bit of the $10 they cost to avoid guessing, and then burning out a good coil in testing.

https://www.amazon.com/Oregon-42-08...ocphy=9030351&hvtargid=pla-310347789777&psc=1
Yup, I use the other Oregon brand in-line spark tester as well as the one you referenced. It has an in-line glass tube looking light filament.
I’ve tested the coil on my Stihl leaf blower. I found a chart that gave a range in ohms for each leg of the coil, I think they called it primary and secondary? Its been a few months, lots of projects ago.
Good thread here.
 
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