New supercharged Mercury puts out 450hp

The 450R accommodates 26-inch centre-to-centre mounting on multi-engine transoms The 450R accommodates 26-inch centre-to-centre mounting on multi-engine transoms
Industry Database

The new Mercury Racing 450R outboard features a 4.6-litre V8 FourStroke powerhead with supercharger to produce 450 peak propshaft horsepower and 40 percent higher torque than the 400R.

Claimed to be over 130kg lighter than the nearest competitor, the new 450R delivers industry leading power-to-weight ratio in a compact, efficient package. Multiple gearcase control system, tie bar and styling options are available, and it is designed to deliver all of its performance on readily available 89-octane (95 RON) pump fuel.

Designed and developed in-house and manufactured in Wisconsin on a dedicated Mercury Racing production line, the 450R is based on the same 4.6-litre V8 powerhead used for the normally aspirated Mercury Racing 300R outboard models.

Mercury Racing has applied its supercharging expertise to extract incredible power from the 4.6-litre V8 with a 2.4-litre, belt-driven twin-screw supercharger that delivers pressure charging with zero lag for instant throttle response.

To maintain peak performance, a boost bypass valve automatically adjusts maximum boost pressure in response to changing ambient conditions. To better manage engine heat, the Mercury Racing 450R is fitted with a special high-capacity oil cooler and an exclusive poppet valve in the midsection to provide a higher volume of cooling-water flow on-demand.

The electronics and engine components are all designed and positioned to create the tightest package possible while maintaining good service access. The design and placement of the new supercharger and charge-air coolers allow the 450R to use the same slim-line cowl as the 300R model while incorporating higher flow intake vents.

Like all Mercury Racing outboards, the 450R accommodates 26-inch centre-to-centre mounting on multi-engine transoms.

The exclusive Mercury Racing Advanced MidSection (AMS) features heavy-duty stainless-steel guide plates and stiffened engine mounts to stabilise the outboard and enhance high-speed handling. The AMS also isolates the powerhead from the transom to insure run quality is smooth and quiet.

The surface-piercing Sport Master gearcase, designed for boats capable of speeds in excess of 85 mph, features low water pick-ups and a crescent leading-edge for maximised efficiency, and for the 450R application, a new, one-piece, 1.25-inch diameter stainless-steel propshaft.

By Jake Frith

Latest Press Releases

Damen Marine Components receives steering system contract for SunStone’s fifth Infinity-class 200 pax polar expedition cruise ship

Damen Marine Components (DMC) has received the contract to supply the rudders and steering gear for ... Read more

Damen secures repeat order from B.C. Ferry Services

BC Ferries has awarded Damen Shipyards Group with a repeat order of four additional Damen Road Ferri... Read more

Concordia Damen wins Ship of the Year

Inland shipping vessel Sendo Liner, built by Concordia Damen, has won the prestigious KNVTS Ship of ... Read more

Innovative Damen-built vessel named in Scheveningen ceremony

On 1st November 2019, the latest Damen Shipyards Group fishing vessel, constructed at Damen Maaskant... Read more

Handover celebration for thirteen Damen tugs

Cutting-edge Damen tugs will serve partnership between Jawar Al Khaleej Shipping and General Company... Read more

View all