NGK 3672 LFR6A-11 Spark Plug, Replaces Yamaha LFR-6A110-00-00, Fits 2001-2006 Mercury & 2000-2005 Yamaha Outboard

The NGK LFR6A-11 spark plug, sold under NGK stock number 3672, is a standard nickel-electrode plug built for outboard marine engines. It uses NGK's Standard Spark Plug construction: a solid copper core center electrode for strong heat dissipation and conductivity, a nickel center electrode tip, and a nickel ground electrode, all housed in a ceramic insulator body. The shell is treated with corrosion-resistant plating so the plug threads in and backs out cleanly during routine maintenance. A 5000-ohm resistor design is built in to help suppress ignition noise. This plug is a factory-equivalent replacement for the Yamaha OEM spark plug LFR-6A110-00-00, and is designed to fit 2001-2006 Mercury outboard engines and 2000-2005 Yamaha outboard engines. The M10 x 1.0 thread size matches these outboard applications. As with any spark plug, always check your engine's maintenance manual and only install the plug type and heat range recommended by the engine's original equipment manufacturer; installing the wrong plug can reduce performance and fuel economy or cause engine damage.

Specifications

• Brand: NGK
• Manufacturer Part Number: 3672
• NGK Part Number: LFR6A-11
• UPC: 087295136720
• Resistance: 5000 ohms
• Ground Configuration: Standard
• Ground Electrode Core Material: Nickel
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Nickel
• Thread Size: M10 x 1.0
• Insulator Material: Ceramic
• Weight: 0.15 pounds
• Package Dimensions: 9.9 x 2.0 x 2.8 centimeters (H x L x W)

Fitment

• 2001-2006 Mercury outboard
• 2000-2005 Yamaha outboard

Replaces (OEM)

• Yamaha OEM LFR-6A110-00-00

Frequently Asked Questions

What outboard engines does the NGK LFR6A-11 spark plug fit? The NGK LFR6A-11 (stock number 3672) fits 2001-2006 Mercury outboard engines and 2000-2005 Yamaha outboard engines.

Is this the same as the Yamaha OEM spark plug? Yes, the NGK LFR6A-11 replaces the Yamaha OEM spark plug LFR-6A110-00-00 and is built to the same specification.

What is the thread size on the NGK 3672 spark plug? M10 x 1.0 is the thread size for the NGK LFR6A-11 spark plug.

What electrode materials are used? Copper forms the center electrode core with a nickel electrode tip, and the ground electrode core is also nickel, on this NGK LFR6A-11 spark plug.

How much resistance does this spark plug have? 5000 ohms of resistance is built into the NGK LFR6A-11 (stock 3672) to help reduce ignition interference.

How much does the NGK 3672 spark plug weigh? The NGK LFR6A-11 spark plug weighs 0.15 pounds.

Is this a genuine NGK part or an aftermarket copy? It is a genuine NGK Standard spark plug, manufactured by NGK under stock number 3672 and part number LFR6A-11, not a third-party copy.

What is included when I order this spark plug? One NGK LFR6A-11 spark plug (stock 3672) is included per unit ordered.

What is the difference between this and NGK's iridium or platinum plugs? The NGK LFR6A-11 is a standard nickel-electrode plug, while NGK's iridium and platinum lines use different center electrode tip materials; the LFR6A-11 is the direct OEM-spec replacement for Yamaha part LFR-6A110-00-00 rather than an upgraded plug.

Does this spark plug use a standard or surface-discharge ground configuration? A standard ground configuration is used on the NGK LFR6A-11 spark plug, not a surface-discharge design.

Can I install this spark plug myself? Yes, the NGK LFR6A-11 is treated with corrosion-resistant plating specifically to make installation and removal easier during routine engine maintenance.

What NGK stock number should I order to get the LFR6A-11 spark plug? Stock number 3672 is NGK's identifier for the LFR6A-11 spark plug.