NGK SPARK PLUGS 6668 Spark Plug — LFR6A 10 PACK

OVERVIEW

The NGK LFR6A spark plug provides reliable ignition and clean combustion to maintain peak power in high-performance marine engines. This multi-piece spark plug set includes ten deep-seated copper core igniters engineered with nickel alloy tips for durable daily operation. Designed as a direct swap for select Yamaha personal watercraft models, this pack ensures your ride fires instantly under demanding conditions.

ENGINEERING & PERFORMANCE

Engineered to withstand extreme thermal cycling, the high alumina ceramic insulator shields the center electrode while dissipating heat rapidly to prevent fouling. The deep-seated copper core expands the effective operating temperature window, allowing the plug to run cooler without sacrificing stability. Nickel alloy construction at critical contact points extends service life while maintaining a crisp spark signature through rich fuel mixtures and aggressive throttle inputs.

KEY FEATURES

• Component Type: Spark Plug
• Set Quantity: 10 Pack
• Tip Construction: Nickel Alloy
• Core Material: Deep-Seated Copper
• Insulator Type: High Alumina Ceramic
• Thermal Control: Wide Operating Heat Range
• Fouling Resistance: Heat Resistant Design
• Versatile Compatibility: Supports numerous Yamaha WaveRunner platforms
• Manufacturer: NGK

TECHNICAL SPECIFICATIONS

• Brand: NGK
• Part Name: LFR6A Spark Plug
• Component Type: Spark Plug
• Material Construction: Copper Core / Nickel Alloy Tip
• Supported Years: 2008–2019
• Compatible Trims: FX Cruiser SHO, FX HO, FX SHO, VXS, VXR, FZR, FZS, FZR SHO, FZS SHO, Cruiser SHO

FITMENT

• Yamaha WaveRunner FX 1800 HO (2009–2011)
• Yamaha WaveRunner FX 1800 SHO (2008–2011, 2017–2018)
• Yamaha WaveRunner FX 1800 A Cruiser SHO (2009–2010, 2012–2013, 2017–2018)
• Yamaha WaveRunner FX Cruiser SHO (2011, 2015–2016)
• Yamaha WaveRunner FX HO (2012–2015)
• Yamaha WaveRunner FX SHO (2012–2015)
• Yamaha WaveRunner FZR (2011–2013)
• Yamaha WaveRunner FZR SHO (2009–2010)
• Yamaha WaveRunner FZS (2009–2010, 2011–2013)
• Yamaha WaveRunner FZS SHO (2009–2010)
• Yamaha WaveRunner VXR (2011–2019)
• Yamaha WaveRunner VXS (2011, 2013–2016)

WHY RIDERS CHOOSE THIS

Riders select the NGK LFR6A because its deep-seated copper core handles wide thermal fluctuations common in high-strung marine engines without cracking or preigniting. The nickel alloy construction provides longer life compared to softer metals, keeping maintenance intervals manageable during busy boating seasons. High alumina insulation ensures electricity flows precisely where needed, delivering reliable starts and full horsepower right out of the package. It matches OEM mounting profiles perfectly, eliminating fit issues while restoring the original spark intensity.