NGK 2623 Spark Plug - Standard Copper Core Plug for Chrysler, Crusader and Mercruiser I/O Engines

The NGK 2623 is a Standard series spark plug built with a solid copper core center electrode for strong heat dissipation and reliable conductivity across a broad heat range. It uses a Standard ground electrode configuration, with a nickel ground electrode, a copper-core center electrode, and a nickel center electrode tip. The plug body is treated with corrosion-resistant plating to keep installation and removal easy over the life of the engine.

NGK 2623 is intended for I/O (inboard/outboard, sterndrive) applications and is listed to fit Chrysler (1979-1975), Crusader (1998-1972), and Mercruiser (2006) I/O engines. As with any spark plug, always check your engine and maintenance manual and use only the plug recommended by your engine's original equipment manufacturer, since using the wrong plug can reduce performance and fuel economy or cause engine damage.

Specifications

• Brand: NGK
• Manufacturer Part Number: 2623
• UPC: 087295126233
• Resistance: 5000 Ohm
• Ground Configuration: Standard
• Ground Electrode Core Material: Nickel
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Nickel
• Weight: 0.15 pounds
• Unit Count: 1

Fitment

• I/O - Chrysler, years 1979-1975
• I/O - Crusader, years 1998-1972
• I/O - Mercruiser, year 2006

Frequently Asked Questions

What engines does the NGK 2623 spark plug fit? The NGK 2623 is listed for I/O (sterndrive) applications on Chrysler engines from 1979-1975, Crusader engines from 1998-1972, and Mercruiser engines from 2006.

Is the NGK 2623 a copper spark plug? Yes, the NGK 2623 has a copper center electrode core paired with a nickel center electrode tip and a nickel ground electrode.

What is the ground electrode configuration on the NGK 2623? The NGK 2623 uses a Standard ground electrode configuration, which is NGK's original ground design.

What is the electrical resistance of the NGK 2623? The NGK 2623 has a resistance rating of 5000 Ohm, which is typical for a resistor-type spark plug designed to suppress ignition noise.

How much does the NGK 2623 spark plug weigh? A single NGK 2623 spark plug weighs 0.15 pounds.

Does the NGK 2623 work on Mercruiser I/O engines only from 2006? For Mercruiser, the NGK 2623 is listed specifically for the 2006 model year I/O application; always confirm against your engine's maintenance manual before ordering.

Is corrosion resistance built into the NGK 2623? Yes, the NGK 2623 spark plug is treated with corrosion-resistant plating to keep threads easy to install and remove over time.

How many spark plugs come in a package? The NGK 2623 is sold as a single spark plug (unit count of 1).

Can I use the NGK 2623 in any I/O engine? No, always check your engine and maintenance manual first. The NGK 2623 is listed for specific I/O applications - Chrysler, Crusader, and Mercruiser - and using the wrong plug can reduce performance, hurt fuel economy, or damage your engine.

Is the NGK 2623 an NGK Standard series plug? Yes, the NGK 2623 belongs to NGK's Standard series, which the company describes as an OE cornerstone that has provided decades of reliable performance.

What material is the ground electrode on the NGK 2623 made of? The ground electrode on the NGK 2623 is made of nickel.