MerCruiser SternDrives    
Small-Block V-8 - 5.7L   

Gas Carbureted

• 3.0L
• 4.3L
• 5.0L
• 5.7L

Gas Fuel Injected

• 4.3L EFI
• 5.0L EFI
• 350 MAG MPI
• 350 MAG MPI Horizon
• MX 6.2MPI
• MX 6.2MPI Horizon
• 496 MAG
• 496 MAG HO

Diesel

• D1.7L DTI
• 2.8L D-Tronic
• 4.2L-LD
• 4.2L
• 4.2L D-Tronic
• 7.3L D-Tronic-LD
• 7.3L D-Tronic

Performance Engines

• HP500 Bulldog™
• Scorpion 377
• HP500 EFI
• HP 575 SCI
• HP 900SC Dry Sump

Compact and powerful, the 5.7L can fit neatly between the stringers while providing quiet, efficient power. The Thunderbolt® V Hi-Energy ignition system with digital electronic spark advance gives this carbureted model improved responsiveness and overall reliability.

Small-Block V-8 - 5.7L

5.7L Specifications

• Propshaft Horsepower: 250 (187 kW)
• Displacement (Liter/CID): 5.7/350
• Cylinders: V-8
• Bore & Stroke (in/mm): 4.00 x 3.48/101 x 88
• Compression Ratio: 9.4:1
• Fuel System: 2-BRL
• Full Throttle RPM Range: 4400-4800
• Ignition Type: Thunderbolt V
• Alternator (amps/watts): 70/988
• Length (in/cm): 37/94
• Width (in/cm): 29/74
• Height (in/cm): 22/56
• Weight (lbs/kg) - Alpha: 938/426
• Weight (lbs/kg) - Bravo One: 973/442
• Weight (lbs/kg) - Bravo Two: 985/447
• Weight (lbs/kg) - Bravo Three: 994/451

Transmission Ratios

• Gear Ratio - Alpha Drive (primary/optional/high altitude): 1.47/1.81/1.62
• Gear Ratio - Bravo One (primary/optional/high altitude): 1.65/1.5/-
• Gear Ratio - Bravo Two (primary/optional/high altitude): 2.2/2.0/-
• Gear Ratio - Bravo Three (primary/optional/high altude): 2.2/2.0/2.43

Standard Features

• Audio warning system
• Ceramic-, EDP- coated and painted exhaust elbows
• Painted cast-iron exhaust manifolds
• Knock-control sensor
• MerCathode® (standard on all Bravo drives)
• Power steering
• Quick-drain oil system
• Serpentine belt
• Multipoint manual water drain system
• Water/fuel separator

Optional Features

• Closed-cooling
• Compact hydraulic steering
• 3" risers
• Mercathode (optional kit on Alpha drive)
• Remote oil filter

Boating Benefits

• Exclusive quick oil drain system that eliminates the need for a pump, simplifying routine maintenance.
• Ceramic- and EDP-coated exhaust elbows for outstanding corrosion resistance.
• Multipoint manual water drain system, which makes winterizing easy.
• 70-amp alternator to handle the demands of today’s state-of-the-art electronic components.
• Water-separating fuel filter that prevents water from entering the fuel system.
• Exclusive audio alarm system that warns you of low oil pressure, high water temperature and excessive transmission temperature.
• Exclusive drive lube monitor conveniently located atop the engine for easy access.
• Compact hydraulic steering available for pontoon applications, which is offered as a factory-installed option on the Alpha drive packages.
• Exclusive Mercury MerCruiser® service dealer network