NGK 7131 BPR6ES Spark Plug - Standard Copper Core Marine Spark Plug

The NGK BPR6ES (NGK part number 7131) is a standard spark plug built on NGK's proven design, combining a solid copper core with nickel-plated electrodes for reliable ignition performance. The copper core promotes efficient heat dissipation and strong conductivity, helping the plug deliver a consistent spark across a broad heat range. Corrosion-resistant plating on the shell and threads makes installation and removal straightforward, reducing the risk of the plug seizing in the cylinder head over time.

This is a resistor-type plug rated at 5,000 Ohm, which helps suppress electrical interference from the ignition system. It uses a standard ground electrode configuration with a nickel ground electrode and a nickel center electrode tip, backed by the copper core for heat transfer. The plug is sized with a 14mm shell thread and a 13/16 inch hex, and is sold as a single spark plug per order.

Always check your engine's maintenance manual to confirm the BPR6ES / NGK 7131 is the correct plug for your engine, and use only the plug type recommended by your engine's original equipment manufacturer. Installing the wrong spark plug can reduce performance, lower fuel economy, or damage the engine.

Specifications

• Brand: NGK
• Manufacturer Part Number: 7131
• NGK Model Designation: BPR6ES
• Type: Standard Spark Plug
• Shell Thread Size: 14mm
• Hex Size: 13/16 inch
• Spark Plug Gap: 0.04 inches
• Resistor: Yes, 5,000 Ohm
• Ground Electrode Configuration: Standard
• Ground Electrode Core Material: Nickel
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Nickel
• Quantity: 1 spark plug per pack
• Weight: 0.15 pounds
• UPC: 087295171318

Frequently Asked Questions

What is NGK part number 7131? NGK part number 7131 is the NGK BPR6ES, a standard resistor-type spark plug with a copper core and nickel-plated electrodes.

Is the NGK BPR6ES a resistor spark plug? Yes, the NGK BPR6ES (part number 7131) is a resistor-type plug rated at 5,000 Ohm, which helps suppress ignition system interference.

What is the hex size for a wrench or spark plug socket? The NGK BPR6ES uses a 13/16 inch hex, so a standard 13/16 inch spark plug socket is needed for installation and removal.

What is the shell thread size on this spark plug? The NGK 7131 / BPR6ES has a 14mm shell thread size.

How many spark plugs are included? The NGK BPR6ES (part number 7131) is sold as a single spark plug per unit, not as a multi-pack.

What is the factory gap setting on this plug? The NGK BPR6ES ships with a 0.04 inch spark plug gap.

What materials are used in the electrodes? The NGK 7131 uses a copper core electrode with a nickel center electrode tip and a nickel ground electrode for heat dissipation and durability.

Is this a genuine NGK spark plug? Yes, the NGK BPR6ES (part number 7131) is a genuine NGK standard spark plug, not an aftermarket clone.

What warranty comes with the NGK BPR6ES? The NGK BPR6ES is covered by a warranty against defects in material or workmanship for 12 months or 12,000 miles, whichever comes first.

How much does the NGK 7131 spark plug weigh? The NGK BPR6ES (part number 7131) weighs 0.15 pounds.

How do I know if the BPR6ES is the right plug for my engine? Check your engine's maintenance manual for the recommended spark plug type before installing the NGK BPR6ES, since using the wrong plug can reduce performance, lower fuel economy, or damage the engine.