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Small Engines (Lawn Mowers, etc.)/B&S 17 hp riding mower, no spark

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Question
Ref:  model  311707
     Type   0132-E1
     Code   980127ze    

I can't get spark on my 17hp B&S engine.  At first I couldn't even get it to turn over.  I replaced all 3 safety switches and the coil (magneto). It now turns over beautifully. I gaped the magneto at .007.  No spark.  I later read on the internet the proper gap is .020.  I've tried them both with no success.  It's a pretty straight forward system, but I'm stumped.  I did order a flywheel puller to see if there is anything under the flywheel that could be creating problems, but I'm not very hopeful.  

Any suggestions would be greatly appreciated.  I can't afford another mower.

Thanks,

John

Answer
Nothing under the flywheel to cause the problem.

Good article on the ignition:

http://www.briggsandstratton.com/us/en/support/faqs/ignition-system-theory-and-t

The easiest way to check the coil is to dis-connect any wires connected to the coil...should only be one small wire.  Check for spark.  If you have spark the coil is good.   

Is the coil mounted correctly?  Not upside down is it?

Eric

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones

Expertise

Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.

Experience

Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

Education/Credentials
MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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