My Yard Machine riding mower won't start. I changed the coil 3 times, each time it was changed it runs a bit longer, eventually quits, cranks, but will not fire. I have talked to a couple mechanics and they have no idea!
By DL from Saskatchewan
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Hello there, I'm sorry to say I don't have a cure for you but I'm in the same boat. Originally when I first started to figure out why it didn't start it was a funny thing. I put an inline spark tester and crank it over and it seemed to have spark but when I just tried a new plug and laid it close to block or head and it had little to no spark.
So I took and replaced the coil which is also know as a ignition module or a magneto and after looking on u-tube for gap etc. It fired right up so I figured I fixed the problem.
Well the next week I decided to replace the drive belt and after completing that (which was no fun), I tried to start and after checking all the possibilities of something I possibly might have do it ended up to have the same symptoms and it points to the coil being bad again. So I'm going to write information down on paper this time so I know what readings I'm getting before, after with both the bad one and the new one.
In all my years of being an auto mechanic I worked on many small engines that have your basic coil/magneto that sits on side of most all of them and they all serve the same purpose. to create spark from magnetic rector wheels that when the flywheel turns around it meets the magneto and sparks the plug. It's fairly basic and generally easy to diagnose but like you it sounds like we have the same issue.
Right now I don't have an answer but I will find out and I'll let you know what I came up with. it's probably something to do with a power or ground issue. 7 out of ten times that ends up being the cause. Take care.
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