NGK 5534 Standard Spark Plug BPR7ES for 1985-2001 Johnson Outboard Motors

The NGK 5534 is a standard nickel spark plug built on NGK's proven copper-core platform, designed for reliable ignition performance and easy long-term serviceability. It carries the NGK BPR7ES designation and is treated with corrosion-resistant plating so it installs and removes cleanly without seizing in the cylinder head. At the core is a solid, 98% pure copper center electrode that improves heat dissipation and conductivity, helping the plug fire consistently and resist overheating under load. A high-grade alumina silicate ceramic insulator provides strength and efficient heat transfer, while cold-rolled threads reduce the risk of cross-threading during installation. Corrugated ribs on the insulator help prevent flashover, and the trivalent plating means no anti-seize compound is required at install. The plug uses a standard ground configuration with a nickel ground electrode and nickel center electrode tip, and carries a resistance rating of 5000 Ohm to help suppress ignition noise. NGK Standard plugs like the 5534 have served as an OE cornerstone across marine and powersport engines for decades. This part is listed for 1985-2001 Johnson outboard motors and 1984-1988 Tanaka outboard engines; always check your engine's maintenance manual to confirm the correct plug before ordering.

Specifications

• Brand: NGK
• Manufacturer Part Number: 5534
• NGK Type Designation: BPR7ES
• UPC: 087295155349
• Thread Size: 14mm x 1.25mm
• Resistance: 5000 Ohm
• Ground Configuration: Standard
• Ground Electrode Core Material: Nickel
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Nickel
• Insulator Material: High-grade alumina silicate ceramic
• Plating: Trivalent
• Weight: 0.15 pounds
• Unit Count: 1 spark plug per package

Fitment

• Johnson outboard motors, 1985-2001
• Tanaka outboard motors, 1984-1988

Replaces (OEM)

• 2023

Frequently Asked Questions

What is the NGK 5534 spark plug? The NGK 5534 is a standard nickel spark plug carrying the NGK BPR7ES type designation, built with a solid copper core center electrode for reliable heat dissipation and conductivity.

Does the NGK 5534 fit a Johnson outboard motor? Yes, the NGK 5534 (BPR7ES) is listed for 1985-2001 Johnson outboard motors. Always confirm against your engine's maintenance manual before ordering.

Is the NGK 5534 the same plug as the NGK BPR7ES? Yes, NGK 5534 is the stock number for the same spark plug identified by the type designation BPR7ES.

What is the thread size on the NGK 5534 spark plug? The NGK 5534 spark plug has a 14mm x 1.25mm thread size.

Does the NGK 5534 require anti-seize compound during installation? No. The NGK 5534 uses trivalent plating, which eliminates the need for anti-seize compound at installation.

What materials are used in the NGK 5534 spark plug? Center electrode core: copper. Ground electrode and center electrode tip: nickel. Insulator: high-grade alumina silicate ceramic. These materials give the NGK 5534 strong heat transfer and durability.

How many spark plugs come in a package? Each package of the NGK 5534 (BPR7ES) contains 1 spark plug.

What is the resistance rating of the NGK 5534? 5000 Ohm is the resistance rating of the NGK 5534 spark plug, which helps suppress ignition noise.

Will the NGK 5534 fit a Tanaka outboard engine? Yes, the NGK 5534 (BPR7ES) is listed as fitting 1984-1988 Tanaka outboard engines.

How much does the NGK 5534 spark plug weigh? The NGK 5534 spark plug weighs 0.15 pounds.

What ground electrode configuration does the NGK 5534 use? A standard ground electrode configuration is used on the NGK 5534 spark plug.

Is there an OEM equivalent part number for the NGK 5534? Yes, part number 2023 is listed as an OEM equivalent for the NGK 5534 (BPR7ES) spark plug.