Replacement 692051 499608 Spark Plug for Briggs & Stratton Lawn Mower Models

What It Is

This is a replacement spark plug (cross-reference numbers 692051 and 499608) designed for Briggs & Stratton engines commonly found in walk-behind lawn mowers, riding mowers, and small tractors. It delivers the ignition spark needed to start and run the engine.

Fitment & Compatibility

Before buying, check your engine’s model number (stamped on the blower housing or valve cover). This plug fits most single-cylinder Briggs & Stratton engines with a 14mm thread size and 0.030” gap. It is an aftermarket equivalent to OEM part numbers 692051 and 499608. Measure the old plug’s thread length (standard is 19mm) and confirm the hex size (5/8” socket). Not compatible with engines requiring a resistor plug (check your manual) or with non-Briggs brands like Kohler or Kawasaki without verifying thread and gap specs.

Key Things to Know

• Gap must be set: This plug doesn’t come pre-gapped. Use a gap tool to set it to 0.030” before installation—wrong gap causes misfires or hard starting.
• Installation torque: Tighten by hand until snug, then 1/2 turn with a wrench. Overtightening can strip threads in the aluminum cylinder head.
• Common gotcha: Some Briggs engines use a shorter or longer reach plug. Measure your old plug’s thread length to avoid piston contact or poor sealing.
• Quality note: At $7.99, this is a budget-friendly aftermarket option. Expect similar performance to OEM but slightly shorter lifespan in heavy-use engines.

Should You Buy It

Buy this if you have a Briggs & Stratton mower engine needing a standard 14mm spark plug and want a low-cost replacement for routine maintenance. It’s ideal for DIY homeowners who gap and install plugs themselves. Skip it if your engine requires a resistor plug, or if you prefer OEM-branded parts for peace of mind.