OEM (Pack of 2) Champion Spark Plugs for Bad Boy 015-8000-00, 015800000 Mower Engine

What It Is

This is an OEM pack of two Champion spark plugs designed as a direct replacement for Bad Boy mowers using part numbers 015-8000-00 or 015800000. They fit select Briggs & Stratton engines commonly found on Bad Boy zero-turn and stand-on mowers.

Fitment & Compatibility

Before buying, confirm your mower’s engine model—these plugs are not universal. Check your Bad Boy’s owner manual or look up the engine’s spark plug gap (usually 0.030″ for these). Measure the old plug’s thread reach (typically 3/4″) and hex size (13/16″) to match. OEM part numbers 015-8000-00 or 015800000 guarantee fit for compatible Briggs & Stratton engines. Aftermarket plugs may vary in gap or heat range, so stick with OEM for guaranteed performance.

Key Things to Know

• Quality: These are genuine OEM Champion plugs, not generic replacements—expect consistent ignition and longer life.
• Installation: Very easy; just remove the old plug, gap the new one to spec (0.030″ is common), and torque to 20-25 ft-lbs. No special tools needed.
• Gotcha: The pack of two covers single-cylinder engines—if your mower has a twin-cylinder engine, you’ll need two packs.
• Common mistake: Don’t overtighten—this can crack the porcelain or strip threads. Hand-tighten then add 1/4 turn.

Should You Buy It

If you own a Bad Boy mower with a compatible Briggs & Stratton engine and need a quick, reliable spark plug replacement, this two-pack is a solid value. It’s ideal for DIY maintenance—just gap and install. Skip it if your engine uses a different plug type (e.g., resistor or extended reach) or if you prefer aftermarket brands.