<p data-end="39" data-start="0"><strong data-end="39" data-start="0">Mercury Racing 400R Outboard Engine</strong></p>
<p data-end="160" data-start="41"><span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Experience unparalleled performance with the Mercury Racing 400R, a 400-horsepower outboard engine engineered for high-performance boating enthusiasts.</span> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">This powerhouse combines cutting-edge technology with precision engineering to deliver exceptional speed, acceleration, and reliability.</span></p>
<p data-end="179" data-start="162"><strong data-end="179" data-start="162">Key Features:</strong></p>
<ul data-end="1096" data-start="181">
<li data-end="334" data-start="181">
<p data-end="334" data-start="183"><strong data-end="214" data-start="183">High-Performance Powerhead:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">The 400R is powered by a 5.7-liter V10 naturally aspirated engine, featuring Mercury Racing's Quad Cam Four Valve (QC4) design. This deep-breathing architecture, combined with a proprietary 92mm throttle body and tuned intake, maximizes airflow and power output.</span></p>
</li>
<li data-end="485" data-start="336">
<p data-end="485" data-start="338"><strong data-end="365" data-start="338">Advanced Sound Control:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Equipped with a dual muffler system, the 400R offers Advanced Sound Control, allowing operators to select between a deep sport tone with a stirring growl on start-up or a quieter operation, enhancing the overall boating experience.</span> </p>
</li>
<li data-end="639" data-start="487">
<p data-end="639" data-start="489"><strong data-end="515" data-start="489">Sport Master Gearcase:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Designed for boats capable of exceeding 85 mph, the race-proven Sport Master gearcase features low water pick-ups and a crescent leading edge to maximize speed and efficiency. It comes with a 1.60:1 gear ratio, ensuring optimal performance at high speeds.</span> </p>
</li>
<li data-end="797" data-start="641">
<p data-end="797" data-start="643"><strong data-end="671" data-start="643">5.44 HD Gearcase Option:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">For heavier bay boats and multi-engine performance center consoles, the 5.44 HD gearcase provides a more submerged design, offering added stern lift and a 1.60:1 gear ratio to handle increased loads effectively.</span> </p>
</li>
<li data-end="948" data-start="799">
<p data-end="948" data-start="801"><strong data-end="822" data-start="801">Optional Tie-Bar:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">An optional rear tie-bar bracket is integrated into the Racing Advanced MidSection (AMS), providing a strong, ultra-light mounting point for rock-solid precision steering on catamarans and other ultra-high-speed applications.</span> </p>
</li>
<li data-end="1096" data-start="950">
<p data-end="1096" data-start="952"><strong data-end="970" data-start="952">Color Options:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">The 400R is available in Phantom Black and Cold Fusion White, allowing boaters to choose a finish that best complements their vessel's aesthetics.</span></p>
</li>
</ul>
<p data-end="1125" data-start="1098"><strong data-end="1125" data-start="1098">Maintenance Essentials:</strong></p>
<ul data-end="1865" data-start="1127">
<li data-end="1451" data-start="1127">
<p data-end="1144" data-start="1129"><strong data-end="1144" data-start="1129">Engine Oil:</strong></p>
<ul data-end="1451" data-start="1147">
<li data-end="1295" data-start="1147">
<p data-end="1295" data-start="1149"><strong data-end="1169" data-start="1149">Recommended Oil:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">For optimal performance, use Mercury Racing 25W‑50 NMMA certified FC‑W® Marine Synthetic Blend.</span></p>
</li>
<li data-end="1451" data-start="1298">
<p data-end="1451" data-start="1300"><strong data-end="1325" data-start="1300">Oil Change Intervals:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Regular oil changes are recommended as per the owner's manual guidelines. The first maintenance typically occurs at the 100-hour mark, during which the engine oil and oil filter should be changed.</span> </p>
</li>
</ul>
</li>
<li data-end="1586" data-start="1453">
<p data-end="1477" data-start="1455"><strong data-end="1477" data-start="1455">Fuel Requirements:</strong></p>
<ul data-end="1586" data-start="1480">
<li data-end="1586" data-start="1480">
<p data-end="1586" data-start="1482"><strong data-end="1500" data-start="1482">Octane Rating:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">The 400R is calibrated to perform optimally with unleaded fuel of at least 89 octane (R+M)/2 or 93 RON. Using the recommended octane level ensures maximum performance and efficiency.</span></p>
</li>
</ul>
</li>
<li data-end="1723" data-start="1588">
<p data-end="1615" data-start="1590"><strong data-end="1615" data-start="1590">Gearcase Maintenance:</strong></p>
<ul data-end="1723" data-start="1618">
<li data-end="1723" data-start="1618">
<p data-end="1723" data-start="1620"><strong data-end="1637" data-start="1620">Gearcase Oil:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Regularly check and replace the gearcase oil as specified in the maintenance schedule to ensure smooth operation and longevity.</span></p>
</li>
</ul>
</li>
<li data-end="1865" data-start="1725">
<p data-end="1743" data-start="1727"><strong data-end="1743" data-start="1727">Spark Plugs:</strong></p>
<ul data-end="1865" data-start="1746">
<li data-end="1865" data-start="1746">
<p data-end="1865" data-start="1748"><strong data-end="1779" data-start="1748">Inspection and Replacement:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Inspect spark plugs periodically and replace them as needed to maintain optimal engine performance. Refer to the owner's manual for the recommended spark plug type and gap settings.</span></p>
</li>
</ul>
</li>
</ul>
<p data-end="1952" data-start="1867"><span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">For comprehensive maintenance schedules and detailed instructions, please refer to the official Mercury Racing 400R Operation and Maintenance Manual.</span></p>
<p data-end="2047" data-start="1954"><em data-end="2001" data-start="1954">Note: <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">The Mercury Racing 400R outboard engine is designed to deliver exceptional performance for high-speed boating applications. Proper maintenance and adherence to recommended service intervals are crucial to ensure its longevity and reliability.</span></em></p>
<p data-end="160" data-start="41"><span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Experience unparalleled performance with the Mercury Racing 400R, a 400-horsepower outboard engine engineered for high-performance boating enthusiasts.</span> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">This powerhouse combines cutting-edge technology with precision engineering to deliver exceptional speed, acceleration, and reliability.</span></p>
<p data-end="179" data-start="162"><strong data-end="179" data-start="162">Key Features:</strong></p>
<ul data-end="1096" data-start="181">
<li data-end="334" data-start="181">
<p data-end="334" data-start="183"><strong data-end="214" data-start="183">High-Performance Powerhead:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">The 400R is powered by a 5.7-liter V10 naturally aspirated engine, featuring Mercury Racing's Quad Cam Four Valve (QC4) design. This deep-breathing architecture, combined with a proprietary 92mm throttle body and tuned intake, maximizes airflow and power output.</span></p>
</li>
<li data-end="485" data-start="336">
<p data-end="485" data-start="338"><strong data-end="365" data-start="338">Advanced Sound Control:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Equipped with a dual muffler system, the 400R offers Advanced Sound Control, allowing operators to select between a deep sport tone with a stirring growl on start-up or a quieter operation, enhancing the overall boating experience.</span> </p>
</li>
<li data-end="639" data-start="487">
<p data-end="639" data-start="489"><strong data-end="515" data-start="489">Sport Master Gearcase:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Designed for boats capable of exceeding 85 mph, the race-proven Sport Master gearcase features low water pick-ups and a crescent leading edge to maximize speed and efficiency. It comes with a 1.60:1 gear ratio, ensuring optimal performance at high speeds.</span> </p>
</li>
<li data-end="797" data-start="641">
<p data-end="797" data-start="643"><strong data-end="671" data-start="643">5.44 HD Gearcase Option:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">For heavier bay boats and multi-engine performance center consoles, the 5.44 HD gearcase provides a more submerged design, offering added stern lift and a 1.60:1 gear ratio to handle increased loads effectively.</span> </p>
</li>
<li data-end="948" data-start="799">
<p data-end="948" data-start="801"><strong data-end="822" data-start="801">Optional Tie-Bar:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">An optional rear tie-bar bracket is integrated into the Racing Advanced MidSection (AMS), providing a strong, ultra-light mounting point for rock-solid precision steering on catamarans and other ultra-high-speed applications.</span> </p>
</li>
<li data-end="1096" data-start="950">
<p data-end="1096" data-start="952"><strong data-end="970" data-start="952">Color Options:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">The 400R is available in Phantom Black and Cold Fusion White, allowing boaters to choose a finish that best complements their vessel's aesthetics.</span></p>
</li>
</ul>
<p data-end="1125" data-start="1098"><strong data-end="1125" data-start="1098">Maintenance Essentials:</strong></p>
<ul data-end="1865" data-start="1127">
<li data-end="1451" data-start="1127">
<p data-end="1144" data-start="1129"><strong data-end="1144" data-start="1129">Engine Oil:</strong></p>
<ul data-end="1451" data-start="1147">
<li data-end="1295" data-start="1147">
<p data-end="1295" data-start="1149"><strong data-end="1169" data-start="1149">Recommended Oil:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">For optimal performance, use Mercury Racing 25W‑50 NMMA certified FC‑W® Marine Synthetic Blend.</span></p>
</li>
<li data-end="1451" data-start="1298">
<p data-end="1451" data-start="1300"><strong data-end="1325" data-start="1300">Oil Change Intervals:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Regular oil changes are recommended as per the owner's manual guidelines. The first maintenance typically occurs at the 100-hour mark, during which the engine oil and oil filter should be changed.</span> </p>
</li>
</ul>
</li>
<li data-end="1586" data-start="1453">
<p data-end="1477" data-start="1455"><strong data-end="1477" data-start="1455">Fuel Requirements:</strong></p>
<ul data-end="1586" data-start="1480">
<li data-end="1586" data-start="1480">
<p data-end="1586" data-start="1482"><strong data-end="1500" data-start="1482">Octane Rating:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">The 400R is calibrated to perform optimally with unleaded fuel of at least 89 octane (R+M)/2 or 93 RON. Using the recommended octane level ensures maximum performance and efficiency.</span></p>
</li>
</ul>
</li>
<li data-end="1723" data-start="1588">
<p data-end="1615" data-start="1590"><strong data-end="1615" data-start="1590">Gearcase Maintenance:</strong></p>
<ul data-end="1723" data-start="1618">
<li data-end="1723" data-start="1618">
<p data-end="1723" data-start="1620"><strong data-end="1637" data-start="1620">Gearcase Oil:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Regularly check and replace the gearcase oil as specified in the maintenance schedule to ensure smooth operation and longevity.</span></p>
</li>
</ul>
</li>
<li data-end="1865" data-start="1725">
<p data-end="1743" data-start="1727"><strong data-end="1743" data-start="1727">Spark Plugs:</strong></p>
<ul data-end="1865" data-start="1746">
<li data-end="1865" data-start="1746">
<p data-end="1865" data-start="1748"><strong data-end="1779" data-start="1748">Inspection and Replacement:</strong> <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">Inspect spark plugs periodically and replace them as needed to maintain optimal engine performance. Refer to the owner's manual for the recommended spark plug type and gap settings.</span></p>
</li>
</ul>
</li>
</ul>
<p data-end="1952" data-start="1867"><span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">For comprehensive maintenance schedules and detailed instructions, please refer to the official Mercury Racing 400R Operation and Maintenance Manual.</span></p>
<p data-end="2047" data-start="1954"><em data-end="2001" data-start="1954">Note: <span class="relative -mx-px my-[-0.2rem] rounded px-px py-[0.2rem]">The Mercury Racing 400R outboard engine is designed to deliver exceptional performance for high-speed boating applications. Proper maintenance and adherence to recommended service intervals are crucial to ensure its longevity and reliability.</span></em></p>
-
Engine hp:400 hp
-
Engine type:V10