Propshaft Horsepower: 385 (287 kw)

Displacement (Liter/CID): 7.4/454

Cylinders: V-8

Bore (in/mm): 4.25/108

Stroke (in/mm): 4.00/102

Compression Ratio: 8.6:1

Fuel Requirements: 87 Posted Octane (R+M)/2

Full Throttle RPM Range: 4600-5000

Ignition Type: Digital

Alternator: 65/917

Length (in/cm): 39/991

Width (in/cm): 32/813

Height (in/cm): 22/559

Weight (lbs/kg): 1177/534 (Weight with Bravo One Drive)

Warranty: 1-year limited, 3-year limited corrosion

MerCruiser's 454 MAG MPI cranks out a potent 385 propshaft horsepower. Technicians enhance the performance of the stock 454 GM block by using high flow cylinder heads with enlarged intake ports that improve air flow throughout the engine. Hardened exhaust valve seat inserts are more tolerant of low lead fuels, improving reliability and engine life. For maximum reliability and strength in high demand situations, we use a forged steel crankshaft, connecting rods, and forged alloy pistons. A technologically advanced roller cam design improves low-end torque, offers higher levels of performance, and aids fuel economy. This, in addition to MerCruiser's exclusive Cross-Ram fuel injection system, results in added torque, improved acceleration, and increase top-end speed. Everything you expect from MerCruiser.


An advanced roller cam design provides a lower friction coefficient, added torque, improved fuel economy, and greater horsepower for improved acceleration and top speed. Bravo One Performance drive available The new MEFI 3 ECM features advanced electronics for more precise fuel and spark control along with better top-end throttle response. Powerful 65-amp/917 watt alternator easily compensates for extra power required by EFI systems and fully charges batteries for dependable starting and powering of additional electrical accessories. EDP coated cast iron exhaust elbows for excellent corrosion resistance. Steel cone clutch provides smooth, quiet shifting operation. Lab finished Mercury Racing Mirage-Plus and Bravo 1 propellers available. Water-cooled and insulated fuel system helps keep fuel temperatures down.