What makes the copper core important in these spark plugs?

The 98% pure copper core is crucial for effective heat dissipation and conductivity. This helps the spark plug maintain its optimal operating temperature, which is vital for reliable ignition and performance across different engine loads.

Why is the trivalent metal plating beneficial?

The trivalent metal plating offers significant advantages by providing superior resistance to corrosion and seizing. This ensures that the spark plugs are easier to install and remove, even after extended periods of use in harsh engine environments.

What is the purpose of the corrugated ribs on the ceramic insulator?

The corrugated ribs on the alumina silicate ceramic insulator are designed to prevent flashover. This helps maintain a strong spark by ensuring the electrical current travels directly to the electrode without arcing along the insulator surface.

NGK Standard Spark Plug (BU8H)

Name: NGK Standard Spark Plug (BU8H)
Brand: NGK
SKU: ngk-ngk-standard-spark-plug-bu8h-pa-ng6431
Price: 35.72 USD
Availability: InStock

$35.72

In Stock

NGK Standard Spark Plug Box of 10 (BU8H). Features a pure copper core for excellent heat dissipation and conductivity.

Key Features

Fits 1978-2002 Mercury and 1978-1999 Mariner Outboard engines.
Pure 98% copper core offers excellent heat dissipation and conductivity.
Trivalent metal plating provides superior anti-corrosion and anti-seizing properties.
High-grade alumina silicate ceramic insulator offers strength and heat transfer.
Corrugated ribs on the insulator body help prevent flashover.
Triple gasket sealing prevents combustion gas leakage.

These spark plugs are designed for specific Mercury and Mariner outboard engine models from 1978 to 2002.

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Product Details

The pure 98% copper core in these NGK Standard spark plugs is key to their performance. It offers solid heat dissipation and conductivity, which helps keep the plug at its optimal operating temperature across a wide range of conditions. These are the same kind of plugs you'd find as original equipment on many engines, built with the reliability NGK is known for.

You'll notice the trivalent metal plating on the threads. This isn't just for looks; it gives you superior protection against corrosion and makes them much easier to install and remove, even after they've been in service for a while. The insulator is made from high-grade alumina silicate ceramic, which is strong and helps transfer heat away effectively, while corrugated ribs on the insulator body help prevent flashover. Plus, the triple gasket sealing is there to make sure no combustion gases leak out.

This box includes ten BU8H spark plugs, making it a convenient way to replace all the plugs on your engine at once. They're built for a long service life and consistent performance.