MerCruiser SternDrives    
Small-Block V-8 - 350 MAG MPI Horizon   

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

It’s amazing how much performance you can pack into a small-block V-8. The 350 Mag MPI Horizon™ is the perfect example. All the maintenance-saving technology of a Horizon engine, all the craftsmanship of MerCruiser® and something you wouldn’t expect from a small-block V-8—300 horsepower.

Small-Block V-8 - 350 MAG MPI Horizon

350 MAG MPI Horizon Specifications

• Propshaft Horsepower: 300 (224 kW)
• Displacement (Liter/CID): 5.7L/350
• Cylinders: V-8
• Bore & Stroke (in/mm): 4.00 x 3.48/101 x 88
• Compression Ratio: 9.4:1
• Fuel System: MPI
• Full Throttle RPM Range: 4600-5000
• Ignition Type: Digital
• Alternator (amps/watts): 70/988
• Length (in/cm): 37/94
• Width (in/cm): 29/74
• Height (in/cm): 22/56
• Weight (lbs/kg) - Alpha: 952/432
• Weight (lbs/kg) - Bravo One: 1025/465
• Weight (lbs/kg) - Bravo Two: 1037/471
• Weight (lbs/kg) - Bravo Three: 1046/475

Transmission Ratios

• Gear Ratio - Alpha Drive (primary/optional/high altitude): 1.47/-/1.62
• ear Ratio - Bravo One (primary/optional/high altitude): 1.5/1.36/1.65
• Gear Ratio - Bravo Two (primary/optional/high altitude): 2.0/1.81/2.2
• Gear Ratio - Bravo Three (primary/optional/high altude): 2.0/1.81/2.2

Standard Features

• Audio warning system
• Closed-cooling
• Constant-tension hose clamps
• Ceramic-, EDP- coated and painted exhaust elbows
• Ceramic- and paint-coated exhaust manifolds
• High-temperature spark plug wires
• Knock-control sensor
• MerCathode® (standard on all Bravo drives)
• Platinum-tipped spark plugs
• Power steering
• Quick-drain oil system
• Remote oil filter
• Serpentine belt
• 90 mm throttle body
• Water-cooled fuel system
• Multipoint manual water drain system
• Water/fuel separator

Optional Features

• Compact hydraulic steering
• 3" risers
• Mercathode (optional kit on Alpha drive)

Boating Benefits

• 3-year extended maintenance interval (except for periodic fluid-level checks and seasonal oil and filter changes).
• 3 years of factory-backed product protection–standard (includes standard 1-year warranty plus 2 years of extended Mercury Product Protection through the Mercury factory-administered program).
• 3-year warranty against corrosion failure.
• Closed-cooling with 5-year coolant.
• Exclusive quick oil drain system that eliminates the need for a pump, simplifying routine maintenance.
• Ceramic-coated exhaust elbows and manifolds for outstanding corrosion resistance.
• Multipoint manual water drain system, which makes winterizing easy.
• Exclusive remote oil filter located atop the engine, simplifying routine maintenance.
• 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