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Prime Guard ACDEMR43T MR43T Marine Spark Plug Copper Core Nickel

Manufacturer

Prime Guard

<h3>Precision Filtration for Every Vehicle</h3> <p>Prime Guard has established itself as a trusted name in automotive filtration, delivering comprehensive protection for engines and vehicle systems across passenger cars, light trucks, and heavy-duty applications. With decades of expertise in filter engineering and manufacturing, the brand focuses on providing dependable filtration solutions that meet the demanding requirements of modern vehicles while offering exceptional value to both professional technicians and DIY enthusiasts.</p> <h3>Comprehensive Filter Coverage</h3> <p>Prime Guard offers one of the industry's most complete lines of oil, air, fuel, and transmission filters for cars and trucks, ensuring that vehicle owners can find the right filtration solution regardless of make or model. The brand's extensive application coverage spans domestic and import vehicles, from economy cars to performance vehicles, and from gasoline engines to diesel powerplants. Prime Guard Filters are manufactured to high quality standards in accordance with Society of Automotive Engineers (SAE) and International Organization for Standardization (ISO) test procedures, providing confidence that each filter meets rigorous industry benchmarks.</p> <h3>Engineered for Performance and Protection</h3> <p>What sets Prime Guard apart is the engineering philosophy behind every filter. Prime Guard filters are designed to meet recommended oil change intervals, tested for quality fit and function, with media designed for maximum efficiency and capacity. This attention to engineering detail ensures that filters not only install correctly but also perform optimally throughout their service life. The filtration media in Prime Guard products balances dirt-holding capacity with flow characteristics, protecting engines from harmful contaminants while maintaining proper system pressure and flow rates.</p> <h3>Quality You Can Trust</h3> <p>With precision engineering and a focus on putting customers first, Prime Guard ensures superior performance, reliability, and value for every mile. The brand's commitment to quality extends from product design through manufacturing, with filters engineered to deliver consistent filtration efficiency that protects critical engine components from premature wear. Whether you're performing routine maintenance on a daily driver or servicing a fleet vehicle, Prime Guard filters provide the protection modern engines need to achieve their designed service life.</p> <p>For professional installers and service centers, Prime Guard represents a filtration solution that delivers OE-quality performance at a competitive price point, making it easier to provide customers with reliable protection without compromise. The brand's broad application coverage and consistent availability make it a practical choice for shops that need dependable parts in stock when customers need them.</p>

Part Number

ACDEMR43T
08/26/2036 7:08 PM
Sale Price

$9,999.99

In Stock (8)

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Usually delivered within 2 days

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Product Details

The Prime Guard ACDEMR43T is a specialty marine spark plug (cross-reference: ACDelco MR43T) engineered for reliable ignition performance in marine applications. Designed as an everyday replacement plug, it delivers dependable performance in jet boats, inboards, outboards, and personal watercraft.

Built with a high-quality copper core, this plug offers excellent heat transfer and stable operating temperatures across varying engine loads — critical for demanding marine environments. The long-reach design makes it compatible with pre-Vortec carbureted marine engines including 3.0L, 4.3L, 5.0L, 5.7L, and 6.2L displacements.

Key Features:

  • Copper core for superior heat transfer and enhanced plug durability
  • Ribbed suppressor seal reduces resistance and helps prevent spark flash-over and misfires
  • Nickel-chrome alloy sheathing on center electrode for corrosion resistance
  • Nickel alloy center electrode tip with pre-gapped at 0.040 in.
  • Resistor-type construction for reduced electromagnetic interference
  • Long-reach design suited for pre-Vortec marine engines

Specifications:

  • Part Number: ACDEMR43T / MR43T
  • GM Part Number: 5613438
  • Center Electrode Tip Material: Nickel Alloy
  • Ground Electrode Tip Material: Nickel
  • Resistor: Yes
  • Pre-Gap Size: 0.040 in.

Cross-Reference / Replaces:

  • NGK: BR6FS, B6FS, BR6FS-15, YR5, YR55
  • Champion: RV8C, RV8C6, RBL8, BL8, BL9Y, RV12C6
  • Mercury/Mercruiser: 33-898264001
  • OMC: 0763819

This plug is a direct-fit replacement for a wide variety of marine engines, making it an ideal choice for tournament ski boats, wakeboard boats, jet boats, and other marine powerplants requiring a reliable, heat-stable spark plug.

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Returning customer from almost 17 years ago! I built a b16a and I bought all of the internals from you guys. Couldn&amp;#039;t find my old account

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