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Small Engines (Lawn Mowers, etc.)/Tecumseh 8 hp no spark when electric starter is engaged


After replacing a bad electric started the engine would not start, had no spark at all. Replaced points and condenser, set gap at .020. I removed the plug and kept it connected to the spark plug wire, grounded the plug to the engine. When engaging the electric starter I'm getting no spark but as soon as I let go of the starter button with the engine still spinning I appear to be getting a strong spark. Any help would be greatly appreciated. Ariens Snowblower 8hp Tecumseh

I would set the points at .018.  Is something, like a wire, grounding the points when the starter is spinning?

You could dis-connect any wires connected to the points, other than the ignition module and then check for spark.

Service manual link:

Let me know what is grounding the points.

Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


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.


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.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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