2024 Mercury 450R 4.6L V8 Outboard Motor

HIGHLIGHTS

• 4.6 Liter V8: The 450R is infused with Mercury Racing DNA. With generous displacement, supercharged induction, and Mercury Racing’s Quad Cam Four Valve (QC4) technology, the V8 FourStroke 450R cranks out the highest level of outboard power ever offered by Mercury Racing.

• Water-Cooled Supercharger: A 2.4-liter belt-driven, twin-screw supercharger delivers zero-lag pressure charging for instant throttle response. The water-cooled supercharger and twin charge-air coolers increase intake air density for higher torque. An electronic boost bypass valve automatically responds to changing conditions.

• Advanced Midsection: The 450R was engineered for life at wide-open throttle. The rugged Advanced MidSection (AMS) features heavy-duty guide plates and stiffened engine mounts to stabilize the outboard for enhanced high-speed handling. AMS isolates the powerhead from the transom to ensure run quality is smooth and quiet at all speeds.

• Gearcase Options: The surface piercing Sport Master gearcase delivers race-proven performance for boats capable of speeds exceeding 85 mph, with low water pick-ups and a crescent leading edge to maximize efficiency and speed. The available cambered skeg counters prop torque for improved control in single-engine installations. The 450R is also available with the 5.44 HD gearcase designed for submerged applications.

KEY FEATURES

• Supercharger: Mercury Racing applies its supercharging expertise to extract incredible power and torque from the 4.6-liter V8. A 2.4-liter belt-driven twin-screw supercharger delivers pressurized ambient air to the intake tract with no lag for instant throttle response. The supercharger is water-cooled to reduce the temperature of the intake charge and increase power and torque.

• Integrated Rear Tie Bar Bracket: An optional rear tie-bar bracket integral to the AMS provides a strong, ultra-light mounting point and uncluttered installation for catamaran and other high-speed applications.

• Advanced Sound Control: The VesselView system enables Advanced Sound Control, a dual muffler system that can be toggled between an ultra-quiet mode and a deep sport tone with a stirring growl on start-up.

• Unrivaled Performance: Make a statement with dynamic power for slingshot acceleration. Designed, tested, and assembled in Wisconsin by the performance experts at Mercury Racing, the supercharged 450R delivers exhilarating performance across the entire RPM range.

• Inspired Engineering: Performance without compromise. Power steering. 115 amp charging. High-performance camshaft. Race-spec Iconel exhaust valves. High-capacity oil and engine cooling. Supercharged through twin charge-air coolers. The 450R is armed with battle-tested technology.

• Advanced Technology: This is smart performance. Zero Effort Digital Throttle and Shift (DTS) can throttle up to six outboards with a single lever. Mercury Transient Spark Technology applies pre-programmed timing advance to optimize torque output. Adaptive Speed Control automatically holds engine rpm regardless of load or condition changes. An available Mercury VesselView offers more systems information than with any other display system in the boating industry.

SPECIFICATIONS

• Full Throttle: 5800-6400 RPM

• Rated HP: 450 HP

• Cylinders: V8

• Displacement: 4.6 L

• Shaft Length: 30"

• Trim System: Power Trim and Tilt

• Mid Section: Race AMS

• Skeg: Straight or Camber

• Warranty: 3-Year

• Bore & Stroke: 3.6 x 3.4" (92 x 86 mm)

• Induction System: Supercharged with Charge Air Cooling and Electronic Boost Control

• Fuel Requirement: Unleaded Regular 89 Octane Minimum (R+M/2) or 95 RON 10% Ethanol Maximum

• Fuel System: Electronic Fuel Injection (EFI) Computer Controlled

• Ignition System: SmartCraft PCM 112 Digital Inductive

• Charging: 115 Amp

• Starting: SmartStart Electric

• Oil Requirement: NMMA Certified FCW SAE 25W-50

• Carb Star Rating: 3-Star

• Minimum Centerline Mounting Distance: 26"

• Steering: Electro-Hydraulic Power Steering with Integral Steering Cylinder

• Throttle & Shift Controls: DTS

• Gear Ratio: 1.60:1

• Dry Weight: 689 lbs

• Idle: 600 RPM

• Mounts: Hard Rubber

• Max Trim Range: 73 deg. (-6 deg. to 67 deg.)

• Max Tilt Range: 20 deg. (-6 deg. to 14 deg.)

• Troll Control: 600-1200 RPM

• Engine Type: V-8 SC 4S

• Cooling System: Water-cooled with Thermostat Control

• Engine Management System: SmartCraft PCM 112

• Engine Protection System: SmartCraft Engine Guardian

• Exhaust System: Selectable

• Lubrication System: Integrated wet sump with oil cooler

• Oil Capacity: 6.6 L

• Steering Angle: + / - 30 deg.

• Gear Shift: F-N-R