Why do these spark plugs have multiple ground electrodes?

Multi-ground electrodes are designed to improve ignition capabilities. They are also less sensitive to the increased voltage requirements that can occur as the spark plug gap grows over time.

What does the copper core in these spark plugs do?

The pure copper core is a key component for heat management. It offers superior heat dissipation and conductivity, which helps the spark plug operate effectively across a wide range of temperatures.

How many spark plugs should I order?

This product is sold as a box of 4 spark plugs. You should order 4 plugs if your vehicle requires them, as is common for many engines.

NGK Multi-Ground Spark Plug LFR7A 92038

Name: NGK Multi-Ground Spark Plug Box of 4 (LFR7A)
Brand: NGK
Price: 34.91 USD
Availability: InStock

NGK Multi-Ground Spark Plug Box of 4 (LFR7A)

$34.91

On Backorder — Expected to ship by May 9, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

NGK Multi-Ground Spark Plug Box of 4 (LFR7A). Offers reliable performance with improved ignition capabilities.

Key Features

Fits select Yamaha WaveRunner models including FX Cruiser SVHO and GP1800 series.
Multi-ground electrodes improve ignition capabilities and are less sensitive to gap growth.
Pure copper core offers superior heat dissipation and conductivity.
High-grade alumina silicate ceramic insulator provides strength and heat transfer.
Trivalent metal plating delivers superior anti-corrosion and anti-seizing properties.
Triple seals prevent combustion gas leakage.

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Will this fit your vehicle?

Product Details

NGK is known for making reliable ignition components that are trusted by manufacturers worldwide. These LFR7A Multi-Ground Spark Plugs are a prime example, offering proven technology for dependable performance. They are designed to meet specific manufacturer ignition requirements, making them a solid choice for your vehicle.

What sets these plugs apart is their multi-ground electrode design, which helps improve ignition capabilities and makes them less sensitive to the increased voltage needed as the gap grows over time. Inside, you'll find a pure copper core that's excellent at dissipating heat and conducting electricity, contributing to a wide range of operating temperatures. The insulator is made from high-grade alumina silicate ceramic, which offers strong dielectric performance and better heat transfer, while corrugated ribs help prevent flashover. Plus, the trivalent metal plating on the exterior provides excellent resistance to corrosion and seizing, making installation and removal much easier.

This set includes four spark plugs, which is the standard quantity for many engines. They fit a range of Yamaha WaveRunner models, including the FX Cruiser SVHO and GP1800 series. Always check the fitment guide to confirm compatibility with your specific watercraft.