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Engineered Marine Products 75-00421 Thermostat Kit 160 Degree OMC Stern Drive

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

75-00421
07/13/2036 9:10 AM
Sale Price

$29.54

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Product Details

The Engineered Marine Products (EMP) 75-00421 is a complete 160-degree thermostat kit engineered for OMC stern drive and inboard marine engines. Designed as a direct replacement for original equipment, this kit maintains proper engine operating temperature to protect performance and prevent overheating.

This thermostat is built to resist the significant variations in coolant pressure that occur at high RPMs, where fluctuations in both temperature and pressure can prevent a standard thermostat from opening at its rated temperature. The all-brass and copper construction ensures reliable, consistent opening at exactly 160°F regardless of engine speed.

Key Features:

  • Opens consistently at 160°F for precise engine temperature control
  • All-brass and copper construction for superior durability and corrosion resistance
  • Engineered to handle high-RPM coolant pressure fluctuations
  • Complete kit includes thermostat, housing gasket, and thermostat gasket
  • Direct OEM replacement fit — no modifications required

Replaces OEM Part Numbers:

  • OMC 383307
  • Mallory 9-43156
  • GLM 13430
  • Sierra 18-3653

Maintaining a properly functioning thermostat is essential to marine engine health. A thermostat stuck open causes the engine to run too cool and lose power and efficiency, while one stuck closed can lead to dangerous overheating. This EMP kit provides everything needed for a complete, reliable thermostat replacement.

It was good

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I received just what I ordered.

I was amazed on how fast I received my item. I was pleased you had what I needed. No one else seemed to be able to help me. Thank you!

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