MerCruiser
350 MAG MPI Horizon (300-hp)

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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	V8
Displacement	5.7 L / 350 CID
Bore & Stroke	4.00
Fuel System	Multi-Point Electronic Fuel Injection
Base Engine Weight	1044 lbs.
Length/Width/Height	32 x 30 x 22
Max RPM@WOT	4800-5200
Warranty	3-year

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 t
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.

Boats Tested with this Engine
Sea Ray 220 Select
Manitou Legacy 24 Triple Tube
Formula 280 Sun Sport (2005 - ) (Not in Production)
Rampage 30 Express - Gas (2003- )
Sea Ray 320 Sundancer

MerCruiser 350 MAG MPI Horizon (300-hp)
Propshaft HP	300-hp
Max RPM@WOT	4800-5200
Dry Weight	1044 lbs.
Length/Width/Height(in)	32 x 30 x 22
Displacement (liters/cu.in)	5.7 L / 350 CID
Cylinders/Configuration	V8
Bore & Stroke	4.00
Alternator Output Rating	65 amp
Fuel Type	Gasoline
Fuel System	Multi-Point Electronic Fuel Injection
Exhaust System	Closed Cooled Iron Manifold w/ Ceramic Coated
Ignition System	Crank-fired High Voltage Switch w/Knocked Control
Cooling System	Closed-cooling


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

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Key Features

MerCruiser 350 MAG MPI Horizon (300-hp)