New
Honda15 HP
Honda BF15
2016 · gasoline
$2,200.00
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Used
Mercury
Mercury 450R
$29,000.00
A 450‑hp supercharged V8 racing outboard from Mercury Racing, optimized for high performance and power‑to‑weight ratio in competitive and recreational marine use.
Horsepower
450 HP
Fuel Type
gasoline
Year
2020
Hours
227
Displacement
4.6L
Stroke
4-stroke
Rated Output
336 kW/ 450 mhp
Rated Speed
6400rpm
In Stock (2 available)
Free shipping on orders over $500
90-day warranty included
Description
The 2020 Mercury Racing 450R is a high‑performance supercharged outboard engine designed for offshore and competition boats. It features a 4.6‑liter V8 FourStroke powerhead with a Mercury Racing supercharger and charge‑air cooling, delivering excellent acceleration and top‑end speed while maintaining reliability typical of Mercury Marine products. Built with advanced materials, electronic fuel injection, and SmartCraft engine management, it’s engineered for serious performance boating.
Specifications
SKUM8070
BrandMercury
CategoryOutboard Engines
ConditionUsed
Horsepower450 HP
Fuel Typegasoline
Year2020
Displacement4.6L
No. of Cylinders8 cylinders
Stroke4-stroke
Shaft Length25
Weight689.00 lbs
Hours227
Rated Output336 kW/ 450 mhp
Rated Speed6400rpm
Cylinder Bore x Stroke92 mm × 86 mm / 3.62 in × 3.39 in
Combustion System4-stroke, DOHC, electronic fuel injection (EFI)
AspirationTurbocharged
Alternator115- amp
Dry Weight312 kg / 689 lbs
ControlsDigital throttle & shift (DTS)
Frequently Asked Questions
What is the Mercury 450R outboard?
The Mercury Racing 450R is a high-performance, supercharged V8 four-stroke outboard motor designed for advanced offshore and high-speed boating applications. It delivers 450 hp in a lightweight, performance-oriented package.
How much horsepower does the 450R produce?
It produces 450 horsepower, making it one of Mercury’s most powerful performance outboards.
What type of engine does the 450R have?
The 450R uses a 4.6 L V8 four-stroke engine with a water-cooled supercharger, Quad Cam Four Valve (QC4) technology, and a high-efficiency induction system to maximize power and torque.
What type of fuel does the 450R require?
This engine runs on unleaded gasoline (regular 89 octane minimum, or 95 RON) with up to 10% ethanol allowed.
What is the full throttle RPM range?
The wide-open throttle (WOT) range is approximately 5800 – 6400 rpm, optimized for both acceleration and top speed.
Does the 450R use fuel injection?
Yes — the 450R features computer-controlled electronic fuel injection (EFI) for precise fuel delivery and performance under load.
What shaft lengths are available?
Multiple shaft lengths are offered, including 20″, 25″, and 30″ versions, so you can match the engine to your boat’s transom height.
Does the 450R have power trim and tilt?
Yes — the 450R includes power trim and tilt as part of its design to allow easy control of engine angle and optimize performance and efficiency.
What kind of midsection does the 450R use?
It uses a race-inspired Advanced MidSection (AMS) with heavy-duty guide plates and reinforced mounts to improve high-speed stability and smooth operation.
What type of steering does the 450R support?
The 450R is equipped with electro-hydraulic power steering with an integral steering cylinder for precise and confident control at speed.
How does the 450R deliver such high performance?
A 2.4-liter belt-driven twin-screw supercharger with water-cooled charge-air coolers gives instant boost pressure without lag, increasing air density for higher torque and power.
. Is the 450R suitable for racing boats?
Yes — with its high power output, supercharged design, and race-ready components, the 450R is meant for offshore performance, race boats, and high-speed offshore platforms.
What boats are ideal for the Mercury 450R?
This outboard is best suited for large offshore center consoles, performance sport boats, catamarans, and other vessels where maximum acceleration and top-end speed are priorities.
How is cooling handled on this high-performance engine?
The 450R includes enhanced cooling systems, including higher-volume cooling-water flow and high-capacity oil coolers to handle the heat generated by supercharged performance.
