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Engineered Marine Products 300-00879 HEI Ignition Coil for MerCruiser Thunderbolt IV & V

Manufacturer

Engineered Marine Products

<h3>Engineered Marine Products: Marine-Grade Reliability for Automotive Systems</h3><p>Engineered Marine Products (EMP) brings precision engineering and marine-grade durability to the automotive aftermarket. With over 1,100 specialized components in their catalog, EMP applies the same rigorous standards required for harsh marine environments to create automotive parts that excel in demanding conditions. This manufacturer has built a reputation for producing components that withstand extreme temperatures, moisture, and vibration—qualities that translate directly to superior performance in automotive applications.</p><h3>Climate Control and Electrical Components</h3><p>One of EMP's core specialties lies in climate control system protection. Their <a href="/13199-engineered-marine-products-hvac-cut-off-switch-4209">HVAC cut-off switches</a> provide critical safety functions for heating and air conditioning systems, automatically interrupting power flow when pressure thresholds are exceeded. These switches serve as essential safeguards against compressor damage and system failures, making them indispensable for maintaining optimal cabin comfort and protecting expensive HVAC components from catastrophic failure.</p><h3>Transmission Control Technology</h3><p>Modern automatic transmissions rely on precise hydraulic control to manage gear changes smoothly and efficiently. EMP's <a href="/13199-engineered-marine-products-automatic-transmission-control-solenoid-7752">automatic transmission control solenoids</a> regulate transmission fluid pressure with exceptional accuracy, ensuring seamless shifts and optimal power delivery. These electro-hydraulic components play a vital role in transmission longevity, as proper solenoid function prevents harsh shifting, slippage, and premature wear of internal clutch packs and bands.</p><h3>Engine Cooling Solutions</h3><p>Maintaining proper engine temperature is fundamental to performance and longevity. EMP manufactures <a href="/13199-engineered-marine-products-engine-water-pump-2208">engine water pumps</a> that circulate coolant throughout the engine block, cylinder heads, and radiator system. Drawing on their marine heritage where cooling system reliability is non-negotiable, these water pumps feature durable construction with corrosion-resistant materials and precision-machined components. A failing water pump can lead to overheating and catastrophic engine damage, making quality replacement parts essential for any cooling system service.</p><h3>Engineering Philosophy</h3><p>What sets Engineered Marine Products apart is their commitment to over-engineering components for extreme conditions. Marine applications demand parts that can handle saltwater corrosion, constant vibration, and temperature fluctuations—challenges that also exist in automotive environments. This design philosophy results in parts with enhanced durability, longer service life, and greater reliability than standard replacement components. Whether you're servicing climate control systems, transmission repairs, or cooling system maintenance, EMP provides components engineered to exceed expectations.</p>

Part Number

300-00879
07/13/2036 2:17 AM
Sale Price

$39.72

2 left at this price

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Usually delivered within 2 days

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Product Details

The Engineered Marine Products 300-00879 is a high-energy ignition (HEI) coil designed for MerCruiser and Crusader marine engines with Thunderbolt IV and V ignition systems. This replacement ignition coil delivers 50,000 volts to ensure reliable spark energy across all RPM ranges, from idle to full throttle.

Key Features:

  • Low inductance, high-temperature windings charge faster for improved spark energy at higher RPMs
  • Converts 12-volt battery power to thousands of volts needed for optimal ignition
  • Designed to handle greater current loads for more complete combustion
  • Includes mounting bracket and hardware for easy installation
  • Built to withstand racing conditions and normal wear and tear

Applications:

  • MerCruiser GM V6 (3.0L 4-cyl 115-140 HP, 4.3L V6 155-205 HP) and V8 (5.0L, 5.7L, 8.4L, 230-575 HP) engines with HEI Thunderbolt IV & V ignition systems
  • Crusader V6 and V8 (180-800 HP) engines (1981-1995)

Replaces OEM Part Numbers: Mercury 8M0079202, 805570A2, 7803A4, 805570A1, 7803; Crusader 37068; Sierra 18-5438; CDI E18-0008; GLM 72115; Mallory 9-29701; PerTronix 40511

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Saved 50% from what the local parts stores were selling it for, even after shipping. Same exact product. I'll definitely be shopping here again. Thanks!

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