BR6FS Spark Plug | NGK 4323

BR6FS Spark Plug | NGK 4323

BR6FS Spark Plug | NGK 4323

Premium NGK spark plugs are known for their reliable performance and superior anti-fouling characteristics.

• NGK spark plug BR6FS
• Stock number 4323
• 14mm thread size
• Resistor
• Tapered Seat
• Standard type
• Gap 0.031 in. (0.8mm)
• 5/8 in. or 16mm hex
• Replaces AC Delco MR43-T
• Replaces Crusader 97782
• Replaces Mercruiser 33-898264001
• Replaces Marine Power 0003-015
• Replaces Champion RV8C
• Replaces BRP 0763819

Additional Information

Expert Performance with the NGK BR6FS 4323 Spark Plug

Achieving peak performance in a marine engine requires high-quality ignition components. Consequently, the NGK BR6FS 4323 Spark Plug is a top-tier choice for inboard and stern drive owners. This standard nickel spark plug is designed specifically for original equipment applications. Because it features a 98% pure copper core, it offers superior heat dissipation. You can rely on this plug to provide consistent ignition in demanding environments. Therefore, it is a favorite for those maintaining Mercruiser, Volvo Penta, and Indmar engines.

Advanced Materials for Marine Durability

First of all, the NGK 4323 utilizes high-grade alumina silicate ceramic. This material creates a stronger insulator for optimal dielectric performance. In addition, the plug features trivalent metal plating on the shell. This plating provides excellent anti-corrosion and anti-seizing properties. Since marine engines are exposed to moisture, this protection is vital. Moreover, the triple gasket sealing process prevents combustion gas leakage. As a result, your engine maintains better compression and overall power.

Optimized Heat Transfer and Engine Safety

Managing engine temperature is critical for long-term reliability. The copper core in the BR6FS aids significantly in heat removal from the combustion chamber. Furthermore, the corrugated ribs on the insulator prevent electrical flashover. This design ensures that the spark stays focused on the gap where it belongs. Since the threads are cold-rolled, they prevent cross-threading during installation. This protects your expensive cylinder heads from unnecessary damage. Thus, the NGK 4323 is both a performance and a safety upgrade.

Wide Compatibility and Seamless Integration

Fortunately, the NGK BR6FS 4323 is compatible with a wide range of GM-based marine engines. It is a direct cross-reference for the AC Delco MR43T and Champion RV8C. Specifically, it fits many pre-Vortec 5.7L and 7.4L V8 engines. Because it is a resistor-type plug, it helps suppress electrical noise for your onboard electronics. However, you should always verify the correct heat range for your specific model. Replacing your plugs annually ensures your boat is always ready for the water.

Frequently Asked Questions

What are the technical specs of the NGK BR6FS 4323?

The plug has a 14mm thread diameter, a .460" reach, and a 5/8" (16mm) hex size. It also features a tapered seat and a solid terminal.

What is the factory gap for the NGK 4323?

The pre-set gap is typically .031" (0.8mm). Nevertheless, you should check your engine manual, as some Indmar applications may require a gap of .035".

Can this plug be used in automotive engines?

Generally, this part is specifically listed for marine and industrial applications. Consequently, it is not recommended for standard automotive use unless specified by the manufacturer.

What does the "R" in BR6FS stand for?

The "R" indicates that it is a resistor spark plug. This feature is important for preventing interference with radios and GPS equipment on your boat.