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Engineered Marine Products 75-08675 Vernatherm Thermal Actuator for Johnson Evinrude Outboards

Manufacturer

Engineered Marine Products

<h3>About Engineered Marine Products (EMP)</h3><p><strong>Engineered Marine Products</strong> — known throughout the industry as EMP — has been a trusted name in marine engine service parts for over 40 years. <a href="/13199-engineered-marine-products">EMP</a> supplies OEMs, distributors, dealers, and professional rebuilders worldwide with high-quality components designed to keep outboard, sterndrive, and inboard engines running reliably on the water.</p><p>What sets EMP apart is its unwavering commitment to OEM-grade engineering. Every component in the EMP catalog is manufactured to meet or exceed original equipment specifications, giving marine technicians and boat owners confidence that a part will fit correctly and perform consistently in demanding freshwater and saltwater environments.</p><h3>A Comprehensive Marine Parts Catalog</h3><p>EMP&apos;s product range spans virtually every critical system of a marine engine. The brand&apos;s catalog — organized around outboards, inboard/sterndrive, and specialty marine applications — covers fuel systems, gearcases, engine internals, cooling systems, steering and controls, seals and gaskets, transom components, and propellers. This breadth makes EMP a reliable single-source supplier for multi-system service jobs.</p><p>At the heart of the EMP lineup are <a href="/13199-engineered-marine-products-fuel-pumps-201310">marine fuel pumps</a>, including complete assemblies, VRO replacement units, and repair kits engineered to restore dependable fuel delivery across a wide range of Mercury, Mariner, Johnson, Evinrude, and other popular engine brands. Consistent fuel delivery is foundational to smooth starts and efficient engine operation, and EMP&apos;s fuel system offerings reflect that priority.</p><p>EMP is equally well-regarded for its <a href="/13199-engineered-marine-products-trim-and-tilt-units-201108">trim and tilt units</a> and associated <a href="/13199-engineered-marine-products-tilttrim-motors-201071">tilt/trim motors</a> — the hydraulic and electrical components that give boaters precise control over engine angle. Whether trimming out for high-speed performance or trimming in to navigate shallow water, a reliable tilt/trim system is essential, and EMP parts are engineered to hold up to the corrosive marine environment.</p><p>Below the waterline, EMP&apos;s <a href="/200345-drive-gearcase-parts-engineered-marine-products-13199">drive and gearcase parts</a> — including seal kits, bearing carriers, and clutch components for MerCruiser, OMC, Volvo Penta, Mercury, and other drives — provide the precision fitment that underwater gear systems demand. The brand also carries a broad selection of general RV &amp; marine replacement components suited for maintenance across a wide variety of watercraft.</p><h3>Why Marine Professionals Choose EMP</h3><ul style="list-style:disc"><li><strong>OEM-level fitment:</strong> Parts are designed to match original manufacturer specifications for accurate installation.</li><li><strong>Wide application coverage:</strong> EMP supports Mercury/Mariner, Johnson/Evinrude, MerCruiser, OMC, Volvo Penta, Yamaha, and more.</li><li><strong>Durability in harsh environments:</strong> Components are built to withstand saltwater exposure, vibration, and thermal stress.</li><li><strong>Trusted supply chain:</strong> Over four decades of distribution to OEMs, dealers, and rebuilders worldwide speaks to EMP&apos;s consistency and reliability.</li></ul><p>Whether you&apos;re a professional marine technician stocking a service bay or a boat owner tackling seasonal maintenance, Engineered Marine Products delivers the quality and fitment assurance that keeps engines running season after season.</p>

Part Number

75-08675
09/12/2036 8:02 PM
Sale Price

$14.72

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Fitment guaranteed

Fitment guaranteed

Product Details

The Engineered Marine Products 75-08675 Vernatherm is a precision thermal actuator designed for Johnson and Evinrude outboard engines. This component serves as the heart of the thermostat system, consisting of brass housing with an internal chamber containing a temperature-sensitive mixture that expands at a predetermined temperature. A piston fits into the chamber sealed with a rubber diaphragm, and as the waxy mixture expands from water heating up, it pushes upward on the piston to actuate the thermostat valve.

Key Features:

  • Fits Johnson/Evinrude 2-cylinder 9.9-15 HP, 3-cylinder 60-70 HP, 4-cylinder 120-140 HP, 6-cylinder 185-225 HP, and V8 275-300 HP outboard engines
  • Replaces OEM part numbers: Johnson/Evinrude/OMC/BRP 394411, GLM 13190, and Sierra 18-1506
  • Compatible with models from 1985-1995
  • Brass construction for durability and corrosion resistance
  • Precision-calibrated temperature activation

The vernatherm maintains accurate engine temperature by controlling the thermostat valve, which floats slightly open at steady speeds to increase or decrease cooling water flow as needed. This critical component ensures optimal engine performance, fuel efficiency, and prevents overheating in your Johnson or Evinrude outboard motor.

pretty snazzy

Quick and easy

easy to use website

Fair price

No issues - a bit slow, but otherwise OK

You guys beat all local auto part dealers in this area by far! I'm going to continue business with this company for a long time. Thank you very much for the savings!

reasonable prices and free ship

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It was easy and the price is good, but this is just the order. If I get the product in the same manor, that will be great. Thanks, Mike

great!

A happy customer returns again

Autoplicity had fast shipping at a low price compared to other competitors. The price for the item itself was the lowest around so I think I got a good deal or my car. Would buy from again!

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