Introduction
This instruction manual provides essential information for the proper handling, installation, and maintenance of your Briggs & Stratton Genuine 491055S Spark Plug. This OEM part is specifically designed to meet exact Briggs & Stratton standards, ensuring reliable performance and longevity for your small gasoline engine. Please read this manual thoroughly before proceeding with any installation or maintenance.
Image: Briggs & Stratton Genuine 491055S Spark Plug.
Safety Information
Always prioritize safety when working with engines. Before performing any maintenance or service, ensure the engine is turned off and cool. Disconnect the spark plug wire to prevent accidental starting. Refer to your engine's operator's manual for specific safety precautions and detailed instructions.
Maintenance: Spark Plug Replacement
Regular spark plug replacement is vital for maintaining engine performance and fuel efficiency. Follow these steps for replacing the Briggs & Stratton 491055S spark plug.
Tools Required:
- Spark plug wrench or socket wrench (appropriate size for 14mm thread)
- New Briggs & Stratton Genuine 491055S Spark Plug
- Spark plug gapping tool (if necessary, consult engine manual for correct gap)
Procedure:
- Disconnect Spark Plug Wire: Before any work, firmly pull the spark plug wire from the existing spark plug. This prevents accidental engine ignition.
Image: Disconnecting the spark plug wire from the engine.
- Remove Old Spark Plug: Use a spark plug wrench or socket wrench to loosen the existing spark plug. Turn counter-clockwise. Once loose, unthread it by hand until it can be removed.
Image: Inspecting the old spark plug after removal.
- Prepare New Spark Plug: Ensure the new Briggs & Stratton 491055S spark plug is correctly gapped according to your engine's specifications. Refer to your engine's operator's manual for the precise gap setting.
- Install New Spark Plug: Carefully thread the new spark plug into the engine by hand to avoid cross-threading. Once it is finger-tight, use the spark plug wrench to snug it. Do not overtighten, as this can damage the plug's seal or the engine's threads. Tighten until snug, then give it a small additional turn (approximately 1/4 to 1/2 turn).
Image: Installing the new spark plug into the engine.
- Reattach Spark Plug Wire: Firmly push the spark plug wire back onto the new spark plug until it clicks into place, ensuring a secure connection.
Instructional Video:
Video: How to change a spark plug on a small engine. This video demonstrates the process of removing and installing a spark plug, highlighting safety precautions and proper tightening techniques.
Product Specifications
| Brand | Briggs & Stratton |
| Model Number | 491055S |
| Replaces Part Numbers | 805015, 72347, 491055 |
| Core Material | Nickel |
| Thread Size | 14mm |
| Top Material Type | Metal |
| Vehicle Service Type | Briggs Stratton Engine Series |
| Item Weight | 1.6 ounces |
| Unit Count | 1.0 Count |
| Manufacturer | Briggs & Stratton |
Warranty Information
Briggs & Stratton Genuine Parts are manufactured to the highest quality standards. For specific warranty details regarding this product, please refer to the official Briggs & Stratton website or contact their customer support. Using genuine parts helps maintain the warranty of your Briggs & Stratton engine.
Customer Support
For further assistance, technical support, or to locate authorized service centers, please visit the official Briggs & Stratton website or contact their customer service department. Always provide your engine model and serial number when seeking support.
Briggs & Stratton Official Website: www.briggsandstratton.com
