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350 MAG MPI Horizon (300-hp)

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350 MAG MPI Horizon (300-hp) 350 MAG MPI Horizon (300-hp)
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.

Fast Facts
Propshaft HP 300-hp
Configuration V-8
Displacement 5.7 L / 350 CID
Bore & Stroke 4.0
Fuel System Multi-Point Electronic Fuel Injection
Base Engine Weight 1,044 lbs.
Length/Width/Height 32x30x22 in.
Max RPM@WOT 4800-5200
Warranty 3 years

Key Features

  • 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.
  • Compact hydraulic steering available for pontoon applications, which is offered as a factory-installed option on the Alpha drive packages.
  • Compact hydraulic steering available for pontoon applications, which is offered as a factory-installed option on the Alpha drive packages.
MerCruiser 350 MAG MPI Horizon (300-hp)
Base Price N/A Max RPM@WOT 4800-5200
Propshaft HP 300-hp Alternator Output Rating 65 amp / 917 Watt Alternator
Dry Weight 1,044 lbs. Fuel Type Gasoline
Length/Width/Height(in) 32x30x22 in. Fuel System Multi-Point Electronic Fuel Injection
Displacement (liters/cu.in) 5.7 L / 350 CID Ignition System Cranked-fired High Voltage Switch w/Knocked Contro
Cylinders/Configuration V-8 Cooling System Closed-cooling
Bore & Stroke 4.0 Exhaust System Closed Cooled Iron Manifold w/ Ceramic Coated
Shaft Length Electronic Engine Display
Aspiration    
Engine Image

MerCruiser 350 MAG MPI Horizon (300-hp)

Multiport Injection (MPI) inboard models are now available with optional Digital Throttle and Shift (DTS). DTS eliminates all helm maintenance and provides silky-smooth shifts for the life of the prod