NGK
NGK Spark Plug BR8ES
NGK Spark Plug BR8ES
SKU:BR8ES
In stock
Pickup available at Blowsion LLC
Usually ready in 2 hours
NGK 3961 BR8ES Nickel Spark Plug
Boost your personal watercraft's (PWC) performance on the waves with the NGK 3961 BR8ES Nickel Spark Plug, a reliable standard plug designed for marine enthusiasts and demanding jet ski applications. Part of NGK's trusted standard series, this spark plug offers solid durability, consistent sparking, and good fuel efficiency, making it perfect for PWCs like Kawasaki Jet Skis and Yamaha WaveRunners. Its nickel construction and copper core ensure reliable starts, smooth operation, and efficient combustion in marine environments, helping you maintain throttle response, minimize fouling, and enjoy dependable performance for everyday rides.
Key Features and Benefits
- Nickel Center Electrode: Standard nickel design for reliable ignition and longevity in high-rev PWC engines.
- Pure Copper Core and Advanced Design: Excellent heat dissipation to prevent overheating. Promotes efficient combustion for consistent power and lower emissions in two-stroke motors.
- Built-in Resistor: 5k Ohm resistor reduces electronic interference, keeping onboard systems clear in wet conditions.
- Heat Range: Rated at 8, ideal for medium- to high-compression marine engines during high-speed runs.
- Corrosion-Resistant: Trivalent metal plating on the shell provides superior anti-corrosion and anti-seizing properties, perfect for saltwater exposure.
Technical Specifications
| Attribute | Details |
|---|---|
| Thread Diameter | 14mm |
| Thread Pitch | 1.25mm |
| Seat Type | Gasket |
| Reach | 19mm (0.75") |
| Hex Size | 20.8mm (13/16") |
| Resistor | Yes (5k Ohm) |
| Heat Range | 8 |
| Electrode Gap | 0.7-0.8mm (0.028-0.031") |
| Center Electrode | Nickel, Standard, Copper core |
| Ground Electrode | Nickel |
| Insulator Material | Alumina Silicate Ceramic |
| Torque Specs | Cast Iron: 18-25.3 lb. ft.; Aluminum: 18-21.6 lb. ft. |
| Connector Type | Solid |
Compatibility and Installation Notes
The NGK 3961 BR8ES serves as a direct replacement for many PWCs equipped with two-stroke engines, providing reliable performance. For use with Kawasaki 750/SXR 800 and Yamaha 61X/62T/64X with aftermarket cylinder heads. Common applications include:
- Kawasaki Jet Skis: 750 SS (1992-1997), 750 SX (1992-1995), 800 SX-R (2003-2011), and similar models.
- Yamaha WaveRunners: XLT800 (2002-2004), SuperJet (1990-2020), Blaster (1993-1996), and similar two-stroke models.
- Sea-Doo: GTX (1993-2002), XP (1993-2002), GTI (2001-2005), and similar models.
Always verify fitment with your PWC's manual or NGK's application guide. Installation is simple using a 13/16-inch spark plug socket and torque wrench; apply anti-seize to threads for aluminum heads to avoid seizing in marine conditions.
With NGK's legacy of quality since 1936 and proven track record in marine applications, the BR8ES Nickel Spark Plug is more than a part—it's your key to unleashing reliable, high-octane fun on the water.
Liability Disclaimer – Closed Course Use Only
Liability Disclaimer – Closed Course Use Only
Blowsion products are intended for closed course competition use only. These products are not designed, tested, or approved for use on public waterways or pollution-controlled vehicles.
Installation and operation of Blowsion components may affect the safety, emissions compliance, and legal status of your watercraft. Use of these products on public waterways may be a violation of federal, state, or local laws.
By purchasing and installing Blowsion products, the user assumes all responsibility and risk associated with their use, including but not limited to personal injury, property damage, or legal penalties.
Always follow proper safety procedures and consult with a qualified technician for installation.
Product Installation Disclaimer:
Warning:
When using electric or battery-operated tools inside the hull, ensure the area is well-ventilated and free of fumes. Failure to follow this precaution may result in fire, explosion, serious injury, or death.
Disconnect the battery before performing any installation or maintenance to prevent accidental ignition or electrical shock.
Allow the engine to cool completely before beginning installation.
No Smoking!
This kit is not designed for use on vehicles equipped with pollution control systems. Installing this kit on such vehicles may violate state or local laws
