NGK Spark Plug: Marine, Nickel Core, 5/8 in Hex Size, 0.551 in Thread Size
The NGK Marine Spark Plug (SKU 60GR54, MPN 4323) is a nickel-core resistor plug with a 5/8 in hex size, 0.551 in thread size, and 0.46 in thread reach, designed for OMC marine applications. It cross-references to…
SKU 3G-OTH-521840
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Product Description
The NGK Marine Spark Plug (SKU 60GR54, MPN 4323) is a nickel-core resistor plug with a 5/8 in hex size, 0.551 in thread size, and 0.46 in thread reach, designed for OMC marine applications. It cross-references to Motorcraft ARF36. 3G Electric interprets demand and delivers this genuine NGK part across 14 industrial departments — with specialist depth in combustion, pumps and controls — ensuring you get the right answer, not just a catalog.
Frequently Asked Questions
What is the NGK Marine Spark Plug 4323 used for?
The NGK Marine Spark Plug 4323 is designed for OMC marine engines, providing reliable ignition in saltwater and freshwater environments. Its nickel-core construction and resistor design reduce radio frequency interference, making it suitable for boats and other marine equipment where consistent spark performance is critical.
What are the specifications of the NGK Spark Plug 4323?
The NGK Spark Plug 4323 has a 5/8 in hex size, 0.551 in thread size, and 0.46 in thread reach. It features a nickel center and ground electrode, is a resistor plug, and cross-references to Motorcraft ARF36. This plug is compatible with OMC marine applications and is manufactured by NGK.
Where to buy NGK Marine Spark Plug 4323 worldwide?
3G Electric supplies the genuine NGK Marine Spark Plug 4323 to customers worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this part to your location. Contact us to source this NGK spark plug for your marine application.
How to select the right NGK spark plug for a marine engine?
To select the correct NGK spark plug for a marine engine, match the thread size, thread reach, and hex size to your engine specifications. For OMC engines, the NGK 4323 with 0.551 in thread size and 0.46 in thread reach is a common choice. Always verify the cross-reference number, such as Motorcraft ARF36, to ensure compatibility.
NGK Products
3G Electric supplies NGK marine spark plugs. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

