Key Features

Genuine Briggs & Stratton OEM Spark Plug — Part 691043, engineered to Briggs & Stratton original equipment standards for dependable ignition performance.
Consistent spark energy and timing — Designed to deliver the correct energy and timing for efficient combustion and smooth engine operation.
Durable construction — Robust firing tip and insulator resist fouling, wear, and high-temperature stress for longer service life.
Accurate fitment — OEM thread size and electrode gap ensure proper installation and combustion efficiency.
Cross-reference awareness — Commonly listed as J19LM with an alternate reference of 797358, aligning with engine service manuals.

Product Details

Part Reference: 691043
Type: Spark plug designed for Briggs & Stratton small engines used in lawn mowers, garden tractors, pressure washers, and other petrol-powered outdoor equipment.
Function: Supports reliable starting, efficient combustion, and smooth engine operation by delivering a stable spark at the correct timing.
Construction notes: Standard firing tip and high-temperature resistant insulator to resist fouling and wear.
Fitment considerations: Engine-specific based on Model–Type–Code; verify with Briggs & Stratton official parts or service manuals before ordering.
Use-case guidance: Ideal for regular maintenance or replacing worn plugs that cause misfires, hard starts, or rough idling.

Applications: Used on select Briggs & Stratton small engines where 691043 is specified in the parts diagram — commonly found on walk-behind lawn mowers, garden tractors and ride-on mowers, pressure washers, and other petrol-powered tools.
Engine types: OHV horizontal-shaft engines and single- or twin-cylinder air-cooled engines with standard spark plug ports.
Fitment confirmation: Exact fit depends on your engine’s Model–Type–Code; always verify against the engine data tag and official Briggs & Stratton parts manual.
Cross-references: Replaces or matches J19LM with alternate reference 797358.