NGK DCPR6E Standard Spark Plug, Stock No. 3481, Copper Core, Surface Discharge, for Johnson Outboard Engines

The NGK DCPR6E is a Standard-series spark plug from NGK, identified by stock number 3481, built around proven technology for reliable ignition performance. It uses a solid copper core center electrode that delivers superior heat dissipation, strong conductivity, and a broad heat range, backed by a corrosion-resistant plating that keeps installation and removal easy over the life of the engine. The ground electrode uses a surface discharge configuration, and the plug is rated at 5,000 ohms of resistance to help suppress ignition interference. Electrode construction pairs a nickel ground electrode core with a copper center electrode core and a nickel center electrode tip, giving the plug durable, consistent sparking across duty cycles.

This plug is classified for use in Johnson outboard engines and is built to the same 12 mm thread with a gasket seat design and 0.749 inch reach found on the OE application it replaces, so fit and seating match factory specifications. As part of NGK's Standard plug lineup, the DCPR6E is positioned as an OE cornerstone plug rather than a premium precious-metal upgrade, giving boaters a dependable, factory-grade replacement. Always check your engine's maintenance manual to confirm the DCPR6E, stock number 3481, is the correct plug for your specific powerhead before ordering, since using the wrong plug can reduce performance, hurt fuel economy, or damage the engine.

Specifications

• Brand: NGK
• Manufacturer Part Number: 3481
• NGK Plug Designation: DCPR6E
• UPC: 087295134818
• Ground Configuration: Surface Discharge
• Ground Electrode Core Material: Nickel
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Nickel
• Resistance: 5,000 Ohm (Resistor Type)
• Thread Size: 12 mm
• Reach: 0.749 inches
• Seat Type: Gasket Seat
• Gap Size: 0.04 inches
• Weight: 0.15 pounds

Fitment

Classified for use in Johnson outboard engines requiring a 12 mm, gasket-seat spark plug to this specification. Confirm against your engine's maintenance manual before ordering.

Replaces (OEM)

• Suzuki 09482-00446

Frequently Asked Questions

What is the part number for this NGK spark plug? This is the NGK DCPR6E spark plug, cataloged under stock number 3481 with UPC 087295134818.

Is the NGK DCPR6E a resistor spark plug? Yes, the NGK DCPR6E (stock number 3481) is a resistor-type plug rated at 5,000 ohms of resistance to help suppress ignition interference.

What thread size does the NGK 3481 spark plug use? The NGK DCPR6E uses a 12 mm thread with a gasket seat design.

How far does the electrode reach into the cylinder head? The NGK DCPR6E has a 0.749 inch reach, matching factory OE dimensions.

What materials are the electrodes made of? The NGK DCPR6E, stock number 3481, has a nickel ground electrode core, a copper center electrode core, and a nickel center electrode tip.

Is there an OEM equivalent number for this plug? Yes, the NGK DCPR6E cross-references to Suzuki OEM part number 09482-00446.

What ground electrode configuration does the DCPR6E use? This plug uses a surface discharge ground electrode configuration.

What engines is the NGK 3481 spark plug used in? The NGK DCPR6E, stock number 3481, is classified for use in Johnson outboard engines requiring a 12 mm gasket-seat plug of this specification.

How much does the NGK DCPR6E spark plug weigh? The NGK DCPR6E, stock number 3481, weighs 0.15 pounds.

What is the electrode gap on the NGK DCPR6E? The gap size on the NGK DCPR6E spark plug is 0.04 inches.

Does this spark plug have corrosion-resistant plating? Yes, the NGK DCPR6E is treated with corrosion-resistant plating to keep installation and removal easy over time.

Is the NGK DCPR6E a genuine NGK plug or aftermarket? It is a genuine NGK Standard-series plug, stock number 3481, not a third-party aftermarket copy.