South Jersey Yacht Sales

Mercury 450R

Mercury 450R

Mercury 450R


The new Mercury Racing 450R high-performance outboard features a 4.6-liter V8 four-stroke platform with an exclusive Mercury Racing supercharger to produce 450 peak propshaft horsepower and 40 percent higher torque than the company’s 400R.  At over 300 pounds lighter than the nearest competitor, the new 450R delivers industry leading power-to-weight ratio in a compact, efficient package with unprecedented acceleration and top speed potential, rugged reliability and the latest technology from Mercury Racing.  Multiple gear case, control system, tie bar, and styling options are available to build the ultimate customized outboard performance package in an engine that’s ready to run wide open throttle all day long.  Additionally, the 450R delivers all of this performance on 89-octane (95 RON) gasoline. 

 Designed and developed in-house and manufactured in Wisconsin, the 450R is based on the same 4.6-liter V8 powerhead used for the normally aspirated Mercury Racing 300R outboard models. The proprietary aluminum block is topped with aluminum cylinder heads featuring Mercury Racing Quad Cam Four Valve design and double overhead camshafts.  A 2.4-liter belt-driven twin-screw supercharger produces zero lag for instant throttle response and is water-cooled to reduce the temperature of the intake charge and increase power. Twin charge-air coolers reduce the temperature of the compressed intake charge to further increase air density and power output. A custom designed intake attenuator reduces high frequency supercharger noise.  

To better manage engine heat, the 450R features a special high-capacity oil cooler and cooling system designed to provide a higher volume of cooling-water flow on-demand. Electronics and other engine components are designed and positioned to create a compact engine while maintaining service access to all components.  Design and placement of the new supercharger and charge-air coolers allow the 450R to use the same cowl as the 300R model while incorporating higher flow intake vents.  Simply pop open the industry-exclusive Top Cowl Service Door for routine engine oil checks and top-offs without removing the cowl.  If needed, an integrated latch and carry handle eases cowl removal for service.   

 As with all Mercury Racing outboards, the 450R accommodates 26-inch center-to-center mounting on multi-engine transoms, perfect for maximizing transom space on new boats or re-power installations.  Mercury Racing engineers addressed every aspect of performance in designing the 450R outboard to achieve maximum power with minimal weight to provide 450 horsepower from an outboard that weighs as little as 689 pounds while offering the best power-to-weight ratio for outboards rated 400 horsepower and above.  The wide-open throttle range is from 5800-6400 rpm allowing for a full complement of Mercury Racing propellers to optimize acceleration, efficiency, and top speed.

Mercury Racing’s Advanced MidSection features heavy-duty stainless steel guide plates and stiffened engine mounts that stabilize the outboard and enhance high-speed handling. An optional rear tie-bar bracket provides a strong, ultra-light mounting point and uncluttered installation for catamaran and other high-speed applications.  The 115-amp alternator is a match for power-hungry electronics. When the Idle Charge battery management system senses low battery voltage it automatically increases engine idle rpm to boost alternator output until batteries are charged to the proper level.

The 450R is compatible with Mercury Racing Zero Effort Digital controls or any Mercury Marine digital control system, which can throttle up to six outboards with a single lever in some applications. Digital throttle and shift technology enhances the high-performance boating experience by providing smooth shifting and instant response while eliminating cable rigging and maintenance. Optional Joystick Piloting for Outboards is available for boats rigged with two to six outboards and provides intuitive, fingertip 360-degree boat control for docking and maneuvering in tight quarters, plus the convenience of Skyhook sea-holding features and integrated auto piloting.

Mercury VesselView offers more systems information and engine data than with any other display system in the boating industry and can simultaneously monitor RPM, speed, fuel flow and efficiency, temperature, trim and more on up to six outboards on an intuitive seven- or nine-inch touchscreen display. VesselView also enables Advanced Sound Control, a dual muffler system that can be toggled between an ultra-quiet mode and a deep sport tone. 

The Mercury Racing 450R outboard is backed by a three-year limited factory warranty and a three-year limited corrosion warranty which can be extended for up to five additional years with a Mercury Product Protection factory-backed extended service plan.
Color options include Cold Fusion white and Mercury Phantom Black.

 For more information on the new Mercury 450R or other Mercury products please contact the South Jersey Yacht Sales office.