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Frequently Asked Questions

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Possible Causes for Ignition Module Failure

What would cause the ignition module to fail?

Because the ignition module is electronic and does not utilize moving components, it is normally one of the most reliable part of the engine. When it does fail, it is usually due to heat caused from improper wiring of the ground wire to battery voltage.

If the engine does not produce spark, other areas of the ignition system should be checked before focusing on the ignition module as source of failure.

The spark plug should be of the specified type, gapped correctly, clean, and in over-all good condition. With your engine Model number and HP information, visit our Spark Plug FAQ to obtain the correct spark plug number and proper gap. Information regarding ignition testing can be found on our Ignition System Theory and Testing FAQ.

Also, ensure the armature air gap is set to your engine model's specifications. The "Tune-Up Specifications" section of your Operator's Manual will provide this information. Other possible causes would be a grounded coil kill wire, or a triggered oil safety guard switch (if equipped).

A good source for engine specifications and technical servicing information would be a Briggs and Stratton Repair Manual (Lookup Repair Manual by Model Series PDF.) The correct Repair Manual for your model engine is often listed in your engine's Illustrated Parts List.

Repair Manuals are available for purchase through our websites Repair Manuals section or locally from a Briggs & Stratton Authorized Dealer.

If no fault is discovered in the above mentioned areas, the ignition module itself may need to be examined. To best determine the cause of failure, please consult 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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