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Engineered Marine Products 75-75512 Thermostat Kit for Mercury Outboard 3-4 Cylinder

Manufacturer

Engineered Marine Products

<h3>About Engineered Marine Products (EMP)</h3><p><strong>Engineered Marine Products</strong>, widely known in the boating world as <strong>EMP</strong>, has been a trusted name in marine parts manufacturing for over 40 years. The company supplies OEMs, distributors, dealers, and rebuilders worldwide with high-quality aftermarket components engineered to meet or exceed original equipment manufacturer (OEM) specifications. Whether you maintain a weekend fishing boat or a performance inboard, EMP&apos;s extensive catalog is built to keep marine engines running reliably season after season.</p><h3>A Marine Parts Specialist Built on Engineering Precision</h3><p>EMP&apos;s foundation is precision manufacturing. Their design and production processes leverage modern engineering technology, with a focus on dimensional accuracy, material quality, and long-term durability in the demanding marine environment. Salt spray, constant vibration, wide temperature swings, and moisture ingress are realities every marine component must survive — and EMP engineers its parts with exactly those conditions in mind.</p><p>The brand&apos;s catalog spans a remarkably wide range of marine engine subsystems. From cooling and fuel delivery to gearcases, propellers, transom components, and steering systems, EMP offers solutions for outboard engines from manufacturers including Mercury/Mariner, Yamaha, BRP (Johnson/Evinrude), and Force, as well as inboard/sterndrive platforms such as MerCruiser, OMC, and Volvo Penta.</p><h3>Ignition and Electrical Components</h3><p>One of EMP&apos;s most comprehensive product areas is marine ignition and electrical systems. Their <a href="/13199-engineered-marine-products-ignition-control-module-10488">Ignition Control Modules</a> and related ignition components cover a broad spectrum of inboard and outboard applications — from distributor caps and rotors for Volvo Penta V8 engines to ignition coil assemblies compatible with MerCruiser 3.0L through 8.4L GM-based powerplants and OMC configurations. Reliable spark delivery is critical to engine performance and starting consistency on the water, and EMP&apos;s ignition lineup is designed to deliver dependable output across the entire RPM range.</p><h3>Gaskets, Seals, and Engine Integrity</h3><p>Keeping a marine engine leak-free is just as important as keeping it firing correctly. EMP&apos;s <a href="/13199-engineered-marine-products-gaskets-seals-201268">Gaskets &amp; Seals</a> lineup addresses the full range of engine and gearcase sealing needs — including gearcase seal kits, Teflon lip seals, fuel injector crush ring kits, and comprehensive engine gasket sets. Proper sealing prevents water intrusion, oil loss, and exhaust leaks that can quickly sideline a boat and lead to expensive engine damage.</p><h3>Why Boaters and Technicians Choose EMP</h3><ul style="list-style:disc"><li><strong>OEM-Grade Quality:</strong> Parts are engineered to meet or exceed original manufacturer specifications, ensuring proper fit and reliable function.</li><li><strong>Broad Application Coverage:</strong> EMP covers major outboard and inboard/sterndrive platforms from leading marine engine brands.</li><li><strong>Trusted Supply Chain:</strong> EMP products are sold through OEMs, distributors, and dealers globally, reflecting deep industry confidence in the brand.</li><li><strong>40+ Years of Manufacturing Heritage:</strong> Decades of marine-specific engineering experience inform every product in the EMP lineup.</li></ul><p>For boat owners, marine technicians, and engine rebuilders who demand components they can count on, Engineered Marine Products delivers the quality and application coverage to get the job done right.</p>

Part Number

75-75512
09/12/2036 5:21 AM
Sale Price

$19.99

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The Engineered Marine Products 75-75512 Thermostat Kit is designed for Mercury and Mariner outboard engines with 3-cylinder and 4-cylinder inline configurations ranging from 70 to 125 horsepower. This complete kit maintains proper engine operating temperature by regulating coolant flow, preventing both overheating and overcooling conditions that can reduce engine performance and longevity.

Key Features:

  • 120-degree Fahrenheit operating temperature for optimal engine performance
  • Fits Mercury/Mariner 3-cylinder: 70, 75, 80, and 90 HP models (specific serial numbers apply)
  • Fits Mercury/Mariner 4-cylinder: 100, 115, and 125 HP models (specific serial numbers apply)
  • Complete kit includes thermostat and necessary gaskets for installation
  • Direct replacement for OEM Mercury part number 803061T1
  • Also replaces Sierra 18-3569 and GLM 13124 aftermarket part numbers
  • Precision-engineered to meet or exceed OEM specifications

This thermostat kit is essential for maintaining the cooling system efficiency in Mercury and Mariner outboards manufactured from 1987 to 1998. Proper thermostat function ensures your engine reaches optimal operating temperature quickly while preventing damage from overheating during operation. Regular thermostat replacement is a critical part of outboard engine maintenance.

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