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Frequently Asked Questions

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Engine Does Not Appear to be Producing Spark

The engine does not appear to be producing spark. Should the Magnetron Ignition Armature be replaced?

A solid state Magnetron Ignition System has been utilized in Briggs & Stratton engines produced since approximately August 1982. Since that time, this system has undergone several upgrades, and today we feel it is an extremely reliable system.

In many cases the armature is replaced during an engine repair when the actual problem could be related to a spark plug, ground wire, safety switch, ignition switch, etc.

When an ignition problem is believed to be related to the armature, the systematic testing procedure below should be used. Replacement of the coil would not be necessary unless it fails to produce a consistent spark in the last step of this procedure. By following this chart
Armature Flow Chart
, the replacement of a perfectly functional coil can be avoided.

For additional Magnetron Ignition System information and testing procedures, please visit our Ignition System Theory and Testing page or Spark Verification FAQ. Ignition/Starter diagrams are available for download from our Electrical schematic/wiring diagrams.

In any event, your best source of information regarding any engine concern would be a Briggs & Stratton Authorized Dealer. Your Briggs & Stratton Authorized Dealer has all the information relating to Briggs & Stratton warranty information, replacement engines, short blocks, parts, pricing, service/repair, specifications, etc.

For your convenience, we offer three easy ways to locate your nearest Briggs & Stratton Authorized Dealers:

  • Use our website's Service Dealer Locator.

  • Visit and enter "Lawn Mowers" or "Engines-Gasoline" in the Category search field and your Postal Code in the Location search field.

  • Call the Briggs & Stratton Automated Hotline at (800) 444-7774. This hotline is available 24 hours a day/7 days a week and features voice recognition technology to assist you in finding the Briggs & Stratton Authorized Dealers in your area. Automated maintenance tips, product information, and FAQs are also offered through voice activated menus.

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